Proof of Theorem cos9thpiminplylem1
| Step | Hyp | Ref
| Expression |
| 1 | | simpr 490 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 0) → 𝑋 = 0) |
| 2 | 1 | oveq1d 7435 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 0) → (𝑋↑3) = (0↑3)) |
| 3 | | 3nn 12422 |
. . . . . . . . . . 11
⊢ 3 ∈
ℕ |
| 4 | 3 | a1i 11 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 0) → 3 ∈
ℕ) |
| 5 | 4 | 0expd 14282 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 0) → (0↑3) =
0) |
| 6 | 2, 5 | eqtrd 2796 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 0) → (𝑋↑3) = 0) |
| 7 | 1 | oveq1d 7435 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 0) → (𝑋↑2) = (0↑2)) |
| 8 | 7 | oveq2d 7436 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 0) → ( -3 · (𝑋↑2)) = ( -3 ·
(0↑2))) |
| 9 | | 2nn 12416 |
. . . . . . . . . . . . 13
⊢ 2 ∈
ℕ |
| 10 | 9 | a1i 11 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑋 = 0) → 2 ∈
ℕ) |
| 11 | 10 | 0expd 14282 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 0) → (0↑2) =
0) |
| 12 | 11 | oveq2d 7436 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 0) → ( -3 · (0↑2)) = (
-3 · 0)) |
| 13 | | 3nn0 12624 |
. . . . . . . . . . . . . . 15
⊢ 3 ∈
ℕ0 |
| 14 | 13 | a1i 11 |
. . . . . . . . . . . . . 14
⊢ (𝜑 → 3 ∈
ℕ0) |
| 15 | 14 | nn0cnd 12669 |
. . . . . . . . . . . . 13
⊢ (𝜑 → 3 ∈
ℂ) |
| 16 | 15 | adantr 486 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑋 = 0) → 3 ∈
ℂ) |
| 17 | 16 | negcld 11656 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 0) → -3 ∈
ℂ) |
| 18 | 17 | mul01d 11509 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 0) → ( -3 · 0) =
0) |
| 19 | 8, 12, 18 | 3eqtrd 2800 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 0) → ( -3 · (𝑋↑2)) = 0) |
| 20 | 19 | oveq1d 7435 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 0) → (( -3 · (𝑋↑2)) + 1) = (0 +
1)) |
| 21 | 6, 20 | oveq12d 7438 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 0) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) = (0 + (0 +
1))) |
| 22 | | 0cnd 11299 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 0) → 0 ∈
ℂ) |
| 23 | | 1cnd 11302 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 0) → 1 ∈
ℂ) |
| 24 | 22, 23 | addcld 11328 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 0) → (0 + 1) ∈
ℂ) |
| 25 | 24 | addlidd 11511 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 0) → (0 + (0 + 1)) = (0 +
1)) |
| 26 | | 1cnd 11302 |
. . . . . . . . 9
⊢ (𝜑 → 1 ∈
ℂ) |
| 27 | 26 | addlidd 11511 |
. . . . . . . 8
⊢ (𝜑 → (0 + 1) =
1) |
| 28 | 27 | adantr 486 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 0) → (0 + 1) = 1) |
| 29 | 21, 25, 28 | 3eqtrd 2800 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 = 0) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) = 1) |
| 30 | | ax-1ne0 11269 |
. . . . . . 7
⊢ 1 ≠
0 |
| 31 | 30 | a1i 11 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 = 0) → 1 ≠ 0) |
| 32 | 29, 31 | eqnetrd 3023 |
. . . . 5
⊢ ((𝜑 ∧ 𝑋 = 0) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 33 | 32 | ad4ant14 765 |
. . . 4
⊢ ((((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) ∧ 𝑋 = 0) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 34 | | simpr 490 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 1) → 𝑋 = 1) |
| 35 | 34 | oveq1d 7435 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 1) → (𝑋↑3) = (1↑3)) |
| 36 | | 3z 12729 |
. . . . . . . . . 10
⊢ 3 ∈
ℤ |
| 37 | | 1exp 14234 |
. . . . . . . . . 10
⊢ (3 ∈
ℤ → (1↑3) = 1) |
| 38 | 36, 37 | mp1i 14 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 1) → (1↑3) =
1) |
| 39 | 35, 38 | eqtrd 2796 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 1) → (𝑋↑3) = 1) |
| 40 | 34 | oveq1d 7435 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 1) → (𝑋↑2) = (1↑2)) |
| 41 | 40 | oveq2d 7436 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 1) → ( -3 · (𝑋↑2)) = ( -3 ·
(1↑2))) |
| 42 | | sq1 14338 |
. . . . . . . . . . . 12
⊢
(1↑2) = 1 |
| 43 | 42 | a1i 11 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 1) → (1↑2) =
1) |
| 44 | 43 | oveq2d 7436 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 1) → ( -3 · (1↑2)) = (
-3 · 1)) |
| 45 | 15 | adantr 486 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑋 = 1) → 3 ∈
ℂ) |
| 46 | 45 | negcld 11656 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 1) → -3 ∈
ℂ) |
| 47 | 46 | mulridd 11326 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 1) → ( -3 · 1) =
-3) |
| 48 | 41, 44, 47 | 3eqtrd 2800 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 1) → ( -3 · (𝑋↑2)) = -3) |
| 49 | 48 | oveq1d 7435 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 1) → (( -3 · (𝑋↑2)) + 1) = ( -3 +
1)) |
| 50 | 39, 49 | oveq12d 7438 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 1) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) = (1 + ( -3 +
1))) |
| 51 | | 1cnd 11302 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 1) → 1 ∈
ℂ) |
| 52 | 46, 51 | addcomd 11512 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 1) → ( -3 + 1) = (1 +
-3)) |
| 53 | 51, 45 | negsubd 11675 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 1) → (1 + -3) = (1 −
3)) |
| 54 | 52, 53 | eqtrd 2796 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 1) → ( -3 + 1) = (1 −
3)) |
| 55 | 54 | oveq2d 7436 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 1) → (1 + ( -3 + 1)) = (1 + (1
− 3))) |
| 56 | | 1p1e2 12466 |
. . . . . . . . . 10
⊢ (1 + 1) =
2 |
| 57 | 56 | a1i 11 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 1) → (1 + 1) = 2) |
| 58 | 57 | oveq1d 7435 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 1) → ((1 + 1) − 3) = (2
− 3)) |
| 59 | 51, 51, 45 | addsubassd 11689 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 1) → ((1 + 1) − 3) = (1 + (1
− 3))) |
| 60 | | 2cnd 12421 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 1) → 2 ∈
ℂ) |
| 61 | 45, 60 | negsubdi2d 11685 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 1) → -(3 − 2) = (2 −
3)) |
| 62 | | 2p1e3 12484 |
. . . . . . . . . . . 12
⊢ (2 + 1) =
3 |
| 63 | 62 | a1i 11 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 1) → (2 + 1) = 3) |
| 64 | 60, 51, 63 | mvlladdcd 11726 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 1) → (3 − 2) =
1) |
| 65 | 64 | negeqd 11551 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 1) → -(3 − 2) =
-1) |
| 66 | 61, 65 | eqtr3d 2798 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 1) → (2 − 3) =
-1) |
| 67 | 58, 59, 66 | 3eqtr3d 2804 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 1) → (1 + (1 − 3)) =
-1) |
| 68 | 50, 55, 67 | 3eqtrd 2800 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 = 1) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) = -1) |
| 69 | | neg1ne0 12307 |
. . . . . . 7
⊢ -1 ≠
0 |
| 70 | 69 | a1i 11 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 = 1) → -1 ≠ 0) |
| 71 | 68, 70 | eqnetrd 3023 |
. . . . 5
⊢ ((𝜑 ∧ 𝑋 = 1) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 72 | 71 | ad4ant14 765 |
. . . 4
⊢ ((((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) ∧ 𝑋 = 1) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 73 | | oveq1 7427 |
. . . . . . . . . 10
⊢ (𝑋 = 2 → (𝑋↑3) = (2↑3)) |
| 74 | 73 | adantl 487 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 2) → (𝑋↑3) = (2↑3)) |
| 75 | | cu2 14343 |
. . . . . . . . 9
⊢
(2↑3) = 8 |
| 76 | 74, 75 | eqtrdi 2812 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 2) → (𝑋↑3) = 8) |
| 77 | | cos9thpiminplylem1.1 |
. . . . . . . . . . . . . . 15
⊢ (𝜑 → 𝑋 ∈ ℤ) |
| 78 | 77 | zred 12803 |
. . . . . . . . . . . . . 14
⊢ (𝜑 → 𝑋 ∈ ℝ) |
| 79 | 78 | resqcld 14268 |
. . . . . . . . . . . . 13
⊢ (𝜑 → (𝑋↑2) ∈ ℝ) |
| 80 | 79 | recnd 11337 |
. . . . . . . . . . . 12
⊢ (𝜑 → (𝑋↑2) ∈ ℂ) |
| 81 | 15, 80 | mulneg1d 11769 |
. . . . . . . . . . 11
⊢ (𝜑 → ( -3 · (𝑋↑2)) = -(3 · (𝑋↑2))) |
| 82 | 81 | adantr 486 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 2) → ( -3 · (𝑋↑2)) = -(3 · (𝑋↑2))) |
| 83 | | oveq1 7427 |
. . . . . . . . . . . . . 14
⊢ (𝑋 = 2 → (𝑋↑2) = (2↑2)) |
| 84 | 83 | adantl 487 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑋 = 2) → (𝑋↑2) = (2↑2)) |
| 85 | | sq2 14340 |
. . . . . . . . . . . . 13
⊢
(2↑2) = 4 |
| 86 | 84, 85 | eqtrdi 2812 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑋 = 2) → (𝑋↑2) = 4) |
| 87 | 86 | oveq2d 7436 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 2) → (3 · (𝑋↑2)) = (3 · 4)) |
| 88 | 87 | negeqd 11551 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 2) → -(3 · (𝑋↑2)) = -(3 ·
4)) |
| 89 | 15 | adantr 486 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑋 = 2) → 3 ∈
ℂ) |
| 90 | | 4cn 12428 |
. . . . . . . . . . . . . 14
⊢ 4 ∈
ℂ |
| 91 | 90 | a1i 11 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑋 = 2) → 4 ∈
ℂ) |
| 92 | 89, 91 | mulcomd 11330 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑋 = 2) → (3 · 4) = (4 ·
3)) |
| 93 | | 4t3e12 12917 |
. . . . . . . . . . . 12
⊢ (4
· 3) = ;12 |
| 94 | 92, 93 | eqtrdi 2812 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 2) → (3 · 4) = ;12) |
| 95 | 94 | negeqd 11551 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 2) → -(3 · 4) = -;12) |
| 96 | 82, 88, 95 | 3eqtrd 2800 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 2) → ( -3 · (𝑋↑2)) = -;12) |
| 97 | 96 | oveq1d 7435 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 2) → (( -3 · (𝑋↑2)) + 1) = ( -;12 + 1)) |
| 98 | 76, 97 | oveq12d 7438 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 2) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) = (8 + ( -;12 + 1))) |
| 99 | | 1nn0 12622 |
. . . . . . . . . . . . . . 15
⊢ 1 ∈
ℕ0 |
| 100 | | 2nn0 12623 |
. . . . . . . . . . . . . . 15
⊢ 2 ∈
ℕ0 |
| 101 | 99, 100 | deccl 12829 |
. . . . . . . . . . . . . 14
⊢ ;12 ∈
ℕ0 |
| 102 | 101 | a1i 11 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑋 = 2) → ;12 ∈ ℕ0) |
| 103 | 102 | nn0cnd 12669 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑋 = 2) → ;12 ∈ ℂ) |
| 104 | 103 | negcld 11656 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 2) → -;12 ∈ ℂ) |
| 105 | | 1cnd 11302 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 2) → 1 ∈
ℂ) |
| 106 | 104, 105 | addcomd 11512 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 2) → ( -;12 + 1) = (1 + -;12)) |
| 107 | 105, 103 | negsubd 11675 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 2) → (1 + -;12) = (1 − ;12)) |
| 108 | 106, 107 | eqtrd 2796 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 2) → ( -;12 + 1) = (1 − ;12)) |
| 109 | 103, 105 | negsubdi2d 11685 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 2) → -(;12 − 1) = (1 − ;12)) |
| 110 | 99, 99 | deccl 12829 |
. . . . . . . . . . . . 13
⊢ ;11 ∈
ℕ0 |
| 111 | 110 | a1i 11 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑋 = 2) → ;11 ∈ ℕ0) |
| 112 | 111 | nn0cnd 12669 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 2) → ;11 ∈ ℂ) |
| 113 | 105, 112 | addcomd 11512 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑋 = 2) → (1 + ;11) = (;11 + 1)) |
| 114 | | eqid 2761 |
. . . . . . . . . . . . 13
⊢ ;11 = ;11 |
| 115 | 99, 99, 56, 114 | decsuc 12850 |
. . . . . . . . . . . 12
⊢ (;11 + 1) = ;12 |
| 116 | 113, 115 | eqtr2di 2813 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 = 2) → ;12 = (1 + ;11)) |
| 117 | 105, 112,
116 | mvrladdd 11728 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 2) → (;12 − 1) = ;11) |
| 118 | 117 | negeqd 11551 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 2) → -(;12 − 1) = -;11) |
| 119 | 108, 109,
118 | 3eqtr2d 2802 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 2) → ( -;12 + 1) = -;11) |
| 120 | 119 | oveq2d 7436 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 2) → (8 + ( -;12 + 1)) = (8 + -;11)) |
| 121 | | 8nn0 12629 |
. . . . . . . . . . 11
⊢ 8 ∈
ℕ0 |
| 122 | 121 | a1i 11 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 2) → 8 ∈
ℕ0) |
| 123 | 122 | nn0cnd 12669 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 2) → 8 ∈
ℂ) |
| 124 | 123, 112 | negsubd 11675 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 2) → (8 + -;11) = (8 − ;11)) |
| 125 | 112, 123 | negsubdi2d 11685 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 2) → -(;11 − 8) = (8 − ;11)) |
| 126 | | 8p3e11 12900 |
. . . . . . . . . . 11
⊢ (8 + 3) =
;11 |
| 127 | 126 | a1i 11 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 = 2) → (8 + 3) = ;11) |
| 128 | 123, 89, 127 | mvlladdcd 11726 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 = 2) → (;11 − 8) = 3) |
| 129 | 128 | negeqd 11551 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 = 2) → -(;11 − 8) = -3) |
| 130 | 124, 125,
129 | 3eqtr2d 2802 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 2) → (8 + -;11) = -3) |
| 131 | 98, 120, 130 | 3eqtrd 2800 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 = 2) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) = -3) |
| 132 | | 0red 11311 |
. . . . . . . . 9
⊢ (𝜑 → 0 ∈
ℝ) |
| 133 | 14 | nn0red 12668 |
. . . . . . . . 9
⊢ (𝜑 → 3 ∈
ℝ) |
| 134 | | neg0 11604 |
. . . . . . . . . . 11
⊢ -0 =
0 |
| 135 | 134 | a1i 11 |
. . . . . . . . . 10
⊢ (𝜑 → -0 = 0) |
| 136 | | 3pos 12451 |
. . . . . . . . . 10
⊢ 0 <
3 |
| 137 | 135, 136 | eqbrtrdi 5144 |
. . . . . . . . 9
⊢ (𝜑 → -0 <
3) |
| 138 | 132, 133,
137 | ltnegcon1d 11896 |
. . . . . . . 8
⊢ (𝜑 → -3 <
0) |
| 139 | 138 | adantr 486 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 = 2) → -3 < 0) |
| 140 | 139 | lt0ne0d 11881 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 = 2) → -3 ≠ 0) |
| 141 | 131, 140 | eqnetrd 3023 |
. . . . 5
⊢ ((𝜑 ∧ 𝑋 = 2) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 142 | 141 | ad4ant14 765 |
. . . 4
⊢ ((((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) ∧ 𝑋 = 2) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 143 | 77 | ad2antrr 739 |
. . . . 5
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → 𝑋 ∈ ℤ) |
| 144 | | 0zd 12705 |
. . . . . . 7
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → 0 ∈
ℤ) |
| 145 | 36 | a1i 11 |
. . . . . . 7
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → 3 ∈
ℤ) |
| 146 | | df-neg 11544 |
. . . . . . . . 9
⊢ -1 = (0
− 1) |
| 147 | | simplr 781 |
. . . . . . . . 9
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → -1 < 𝑋) |
| 148 | 146, 147 | eqbrtrrid 5141 |
. . . . . . . 8
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → (0 − 1) < 𝑋) |
| 149 | | zlem1lt 12748 |
. . . . . . . . 9
⊢ ((0
∈ ℤ ∧ 𝑋
∈ ℤ) → (0 ≤ 𝑋 ↔ (0 − 1) < 𝑋)) |
| 150 | 149 | biimpar 483 |
. . . . . . . 8
⊢ (((0
∈ ℤ ∧ 𝑋
∈ ℤ) ∧ (0 − 1) < 𝑋) → 0 ≤ 𝑋) |
| 151 | 144, 143,
148, 150 | syl21anc 851 |
. . . . . . 7
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → 0 ≤ 𝑋) |
| 152 | | simpr 490 |
. . . . . . 7
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → 𝑋 < 3) |
| 153 | | elfzo 13795 |
. . . . . . . 8
⊢ ((𝑋 ∈ ℤ ∧ 0 ∈
ℤ ∧ 3 ∈ ℤ) → (𝑋 ∈ (0..^3) ↔ (0 ≤ 𝑋 ∧ 𝑋 < 3))) |
| 154 | 153 | biimpar 483 |
. . . . . . 7
⊢ (((𝑋 ∈ ℤ ∧ 0 ∈
ℤ ∧ 3 ∈ ℤ) ∧ (0 ≤ 𝑋 ∧ 𝑋 < 3)) → 𝑋 ∈ (0..^3)) |
| 155 | 143, 144,
145, 151, 152, 154 | syl32anc 1405 |
. . . . . 6
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → 𝑋 ∈ (0..^3)) |
| 156 | | fzo0to3tp 13887 |
. . . . . 6
⊢ (0..^3) =
{0, 1, 2} |
| 157 | 155, 156 | eleqtrdi 2871 |
. . . . 5
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → 𝑋 ∈ {0, 1, 2}) |
| 158 | | eltpg 4647 |
. . . . . 6
⊢ (𝑋 ∈ ℤ → (𝑋 ∈ {0, 1, 2} ↔ (𝑋 = 0 ∨ 𝑋 = 1 ∨ 𝑋 = 2))) |
| 159 | 158 | biimpa 482 |
. . . . 5
⊢ ((𝑋 ∈ ℤ ∧ 𝑋 ∈ {0, 1, 2}) → (𝑋 = 0 ∨ 𝑋 = 1 ∨ 𝑋 = 2)) |
| 160 | 143, 157,
159 | syl2anc 596 |
. . . 4
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → (𝑋 = 0 ∨ 𝑋 = 1 ∨ 𝑋 = 2)) |
| 161 | 33, 72, 142, 160 | mpjao3dan 1459 |
. . 3
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 𝑋 < 3) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 162 | 77, 14 | zexpcld 14230 |
. . . . . . . . . 10
⊢ (𝜑 → (𝑋↑3) ∈ ℤ) |
| 163 | 162 | zred 12803 |
. . . . . . . . 9
⊢ (𝜑 → (𝑋↑3) ∈ ℝ) |
| 164 | 133 | renegcld 11743 |
. . . . . . . . . 10
⊢ (𝜑 → -3 ∈
ℝ) |
| 165 | 164, 79 | remulcld 11339 |
. . . . . . . . 9
⊢ (𝜑 → ( -3 · (𝑋↑2)) ∈
ℝ) |
| 166 | 163, 165 | readdcld 11338 |
. . . . . . . 8
⊢ (𝜑 → ((𝑋↑3) + ( -3 · (𝑋↑2))) ∈ ℝ) |
| 167 | 166 | adantr 486 |
. . . . . . 7
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → ((𝑋↑3) + ( -3 · (𝑋↑2))) ∈ ℝ) |
| 168 | | 1red 11309 |
. . . . . . 7
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 1 ∈ ℝ) |
| 169 | 79 | adantr 486 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → (𝑋↑2) ∈ ℝ) |
| 170 | 78, 133 | resubcld 11744 |
. . . . . . . . . 10
⊢ (𝜑 → (𝑋 − 3) ∈ ℝ) |
| 171 | 170 | adantr 486 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → (𝑋 − 3) ∈ ℝ) |
| 172 | 78 | adantr 486 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 𝑋 ∈ ℝ) |
| 173 | 172 | sqge0d 14280 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 0 ≤ (𝑋↑2)) |
| 174 | 133 | adantr 486 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 3 ∈ ℝ) |
| 175 | | 0red 11311 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 0 ∈ ℝ) |
| 176 | | simpr 490 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 3 ≤ 𝑋) |
| 177 | 78 | recnd 11337 |
. . . . . . . . . . . . 13
⊢ (𝜑 → 𝑋 ∈ ℂ) |
| 178 | 177 | subid1d 11658 |
. . . . . . . . . . . 12
⊢ (𝜑 → (𝑋 − 0) = 𝑋) |
| 179 | 178 | adantr 486 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → (𝑋 − 0) = 𝑋) |
| 180 | 176, 179 | breqtrrd 5133 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 3 ≤ (𝑋 − 0)) |
| 181 | 174, 172,
175, 180 | lesubd 11920 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 0 ≤ (𝑋 − 3)) |
| 182 | 169, 171,
173, 181 | mulge0d 11893 |
. . . . . . . 8
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 0 ≤ ((𝑋↑2) · (𝑋 − 3))) |
| 183 | 80, 177, 15 | subdid 11772 |
. . . . . . . . . 10
⊢ (𝜑 → ((𝑋↑2) · (𝑋 − 3)) = (((𝑋↑2) · 𝑋) − ((𝑋↑2) · 3))) |
| 184 | 80, 177 | mulcld 11329 |
. . . . . . . . . . 11
⊢ (𝜑 → ((𝑋↑2) · 𝑋) ∈ ℂ) |
| 185 | 80, 15 | mulcld 11329 |
. . . . . . . . . . 11
⊢ (𝜑 → ((𝑋↑2) · 3) ∈
ℂ) |
| 186 | 184, 185 | negsubd 11675 |
. . . . . . . . . 10
⊢ (𝜑 → (((𝑋↑2) · 𝑋) + -((𝑋↑2) · 3)) = (((𝑋↑2) · 𝑋) − ((𝑋↑2) · 3))) |
| 187 | 99 | a1i 11 |
. . . . . . . . . . . . 13
⊢ (𝜑 → 1 ∈
ℕ0) |
| 188 | 100 | a1i 11 |
. . . . . . . . . . . . 13
⊢ (𝜑 → 2 ∈
ℕ0) |
| 189 | 177, 187,
188 | expaddd 14291 |
. . . . . . . . . . . 12
⊢ (𝜑 → (𝑋↑(2 + 1)) = ((𝑋↑2) · (𝑋↑1))) |
| 190 | 62 | a1i 11 |
. . . . . . . . . . . . 13
⊢ (𝜑 → (2 + 1) =
3) |
| 191 | 190 | oveq2d 7436 |
. . . . . . . . . . . 12
⊢ (𝜑 → (𝑋↑(2 + 1)) = (𝑋↑3)) |
| 192 | 177 | exp1d 14284 |
. . . . . . . . . . . . 13
⊢ (𝜑 → (𝑋↑1) = 𝑋) |
| 193 | 192 | oveq2d 7436 |
. . . . . . . . . . . 12
⊢ (𝜑 → ((𝑋↑2) · (𝑋↑1)) = ((𝑋↑2) · 𝑋)) |
| 194 | 189, 191,
193 | 3eqtr3rd 2805 |
. . . . . . . . . . 11
⊢ (𝜑 → ((𝑋↑2) · 𝑋) = (𝑋↑3)) |
| 195 | 80, 15 | mulcomd 11330 |
. . . . . . . . . . . . 13
⊢ (𝜑 → ((𝑋↑2) · 3) = (3 · (𝑋↑2))) |
| 196 | 195 | negeqd 11551 |
. . . . . . . . . . . 12
⊢ (𝜑 → -((𝑋↑2) · 3) = -(3 · (𝑋↑2))) |
| 197 | 196, 81 | eqtr4d 2799 |
. . . . . . . . . . 11
⊢ (𝜑 → -((𝑋↑2) · 3) = ( -3 · (𝑋↑2))) |
| 198 | 194, 197 | oveq12d 7438 |
. . . . . . . . . 10
⊢ (𝜑 → (((𝑋↑2) · 𝑋) + -((𝑋↑2) · 3)) = ((𝑋↑3) + ( -3 · (𝑋↑2)))) |
| 199 | 183, 186,
198 | 3eqtr2d 2802 |
. . . . . . . . 9
⊢ (𝜑 → ((𝑋↑2) · (𝑋 − 3)) = ((𝑋↑3) + ( -3 · (𝑋↑2)))) |
| 200 | 199 | adantr 486 |
. . . . . . . 8
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → ((𝑋↑2) · (𝑋 − 3)) = ((𝑋↑3) + ( -3 · (𝑋↑2)))) |
| 201 | 182, 200 | breqtrd 5131 |
. . . . . . 7
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 0 ≤ ((𝑋↑3) + ( -3 · (𝑋↑2)))) |
| 202 | | 0lt1 11838 |
. . . . . . . 8
⊢ 0 <
1 |
| 203 | 202 | a1i 11 |
. . . . . . 7
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 0 < 1) |
| 204 | 167, 168,
201, 203 | addgegt0d 11889 |
. . . . . 6
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 0 < (((𝑋↑3) + ( -3 · (𝑋↑2))) + 1)) |
| 205 | 163 | recnd 11337 |
. . . . . . . 8
⊢ (𝜑 → (𝑋↑3) ∈ ℂ) |
| 206 | 205 | adantr 486 |
. . . . . . 7
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → (𝑋↑3) ∈ ℂ) |
| 207 | 165 | recnd 11337 |
. . . . . . . 8
⊢ (𝜑 → ( -3 · (𝑋↑2)) ∈
ℂ) |
| 208 | 207 | adantr 486 |
. . . . . . 7
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → ( -3 · (𝑋↑2)) ∈ ℂ) |
| 209 | | 1cnd 11302 |
. . . . . . 7
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 1 ∈ ℂ) |
| 210 | 206, 208,
209 | addassd 11331 |
. . . . . 6
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → (((𝑋↑3) + ( -3 · (𝑋↑2))) + 1) = ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1))) |
| 211 | 204, 210 | breqtrd 5131 |
. . . . 5
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → 0 < ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1))) |
| 212 | 211 | gt0ne0d 11880 |
. . . 4
⊢ ((𝜑 ∧ 3 ≤ 𝑋) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 213 | 212 | adantlr 728 |
. . 3
⊢ (((𝜑 ∧ -1 < 𝑋) ∧ 3 ≤ 𝑋) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 214 | 78 | adantr 486 |
. . 3
⊢ ((𝜑 ∧ -1 < 𝑋) → 𝑋 ∈ ℝ) |
| 215 | 133 | adantr 486 |
. . 3
⊢ ((𝜑 ∧ -1 < 𝑋) → 3 ∈ ℝ) |
| 216 | 161, 213,
214, 215 | ltlecasei 11418 |
. 2
⊢ ((𝜑 ∧ -1 < 𝑋) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 217 | 163 | adantr 486 |
. . . . 5
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (𝑋↑3) ∈ ℝ) |
| 218 | 165 | adantr 486 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ( -3 · (𝑋↑2)) ∈
ℝ) |
| 219 | | 1red 11309 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 1 ∈
ℝ) |
| 220 | 218, 219 | readdcld 11338 |
. . . . 5
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (( -3 · (𝑋↑2)) + 1) ∈
ℝ) |
| 221 | 217, 220 | readdcld 11338 |
. . . 4
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ∈
ℝ) |
| 222 | 164 | adantr 486 |
. . . 4
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -3 ∈
ℝ) |
| 223 | | 0red 11311 |
. . . 4
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 0 ∈
ℝ) |
| 224 | 217, 218 | readdcld 11338 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ((𝑋↑3) + ( -3 · (𝑋↑2))) ∈ ℝ) |
| 225 | | 4re 12427 |
. . . . . . . 8
⊢ 4 ∈
ℝ |
| 226 | 225 | a1i 11 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 4 ∈
ℝ) |
| 227 | 226 | renegcld 11743 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -4 ∈
ℝ) |
| 228 | | 1red 11309 |
. . . . . . . . . 10
⊢ (𝜑 → 1 ∈
ℝ) |
| 229 | 228 | renegcld 11743 |
. . . . . . . . 9
⊢ (𝜑 → -1 ∈
ℝ) |
| 230 | 229 | adantr 486 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -1 ∈
ℝ) |
| 231 | 78 | adantr 486 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 𝑋 ∈ ℝ) |
| 232 | 3 | a1i 11 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 3 ∈
ℕ) |
| 233 | | n2dvds3 16541 |
. . . . . . . . . . 11
⊢ ¬ 2
∥ 3 |
| 234 | 233 | a1i 11 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ¬ 2 ∥
3) |
| 235 | | simpr 490 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 𝑋 ≤ -1) |
| 236 | 231, 230,
232, 234, 235 | oexpled 33427 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (𝑋↑3) ≤ ( -1↑3)) |
| 237 | | m1expo 16545 |
. . . . . . . . . 10
⊢ ((3
∈ ℤ ∧ ¬ 2 ∥ 3) → ( -1↑3) =
-1) |
| 238 | 36, 234, 237 | sylancr 599 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ( -1↑3) =
-1) |
| 239 | 236, 238 | breqtrd 5131 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (𝑋↑3) ≤ -1) |
| 240 | 232 | nncnd 12351 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 3 ∈
ℂ) |
| 241 | 80 | adantr 486 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (𝑋↑2) ∈ ℂ) |
| 242 | 240, 241 | mulneg1d 11769 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ( -3 · (𝑋↑2)) = -(3 · (𝑋↑2))) |
| 243 | 133 | adantr 486 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 3 ∈
ℝ) |
| 244 | 133, 79 | remulcld 11339 |
. . . . . . . . . . 11
⊢ (𝜑 → (3 · (𝑋↑2)) ∈
ℝ) |
| 245 | 244 | adantr 486 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (3 · (𝑋↑2)) ∈
ℝ) |
| 246 | 79 | adantr 486 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (𝑋↑2) ∈ ℝ) |
| 247 | 13 | nn0ge0i 12633 |
. . . . . . . . . . . 12
⊢ 0 ≤
3 |
| 248 | 247 | a1i 11 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 0 ≤ 3) |
| 249 | 231, 219,
235 | lenegcon2d 11899 |
. . . . . . . . . . . . . 14
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 1 ≤ -𝑋) |
| 250 | 231 | renegcld 11743 |
. . . . . . . . . . . . . . 15
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -𝑋 ∈ ℝ) |
| 251 | | 0le1 11839 |
. . . . . . . . . . . . . . . 16
⊢ 0 ≤
1 |
| 252 | 251 | a1i 11 |
. . . . . . . . . . . . . . 15
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 0 ≤ 1) |
| 253 | | neg1rr 12306 |
. . . . . . . . . . . . . . . . . . . 20
⊢ -1
∈ ℝ |
| 254 | | 0re 11310 |
. . . . . . . . . . . . . . . . . . . 20
⊢ 0 ∈
ℝ |
| 255 | | neg1lt0 12308 |
. . . . . . . . . . . . . . . . . . . 20
⊢ -1 <
0 |
| 256 | 253, 254,
255 | ltleii 11433 |
. . . . . . . . . . . . . . . . . . 19
⊢ -1 ≤
0 |
| 257 | 256 | a1i 11 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -1 ≤ 0) |
| 258 | 231, 230,
223, 235, 257 | letrd 11467 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 𝑋 ≤ 0) |
| 259 | | leneg 11819 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝑋 ∈ ℝ ∧ 0 ∈
ℝ) → (𝑋 ≤ 0
↔ -0 ≤ -𝑋)) |
| 260 | 259 | biimpa 482 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑋 ∈ ℝ ∧ 0 ∈
ℝ) ∧ 𝑋 ≤ 0)
→ -0 ≤ -𝑋) |
| 261 | 231, 223,
258, 260 | syl21anc 851 |
. . . . . . . . . . . . . . . 16
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -0 ≤ -𝑋) |
| 262 | 134, 261 | eqbrtrrid 5141 |
. . . . . . . . . . . . . . 15
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 0 ≤ -𝑋) |
| 263 | 219, 250,
252, 262 | le2sqd 14401 |
. . . . . . . . . . . . . 14
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (1 ≤ -𝑋 ↔ (1↑2) ≤ ( -𝑋↑2))) |
| 264 | 249, 263 | mpbid 235 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (1↑2) ≤ ( -𝑋↑2)) |
| 265 | 231 | recnd 11337 |
. . . . . . . . . . . . . 14
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 𝑋 ∈ ℂ) |
| 266 | 265 | sqnegd 14259 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ( -𝑋↑2) = (𝑋↑2)) |
| 267 | 264, 266 | breqtrd 5131 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (1↑2) ≤ (𝑋↑2)) |
| 268 | 42, 267 | eqbrtrrid 5141 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 1 ≤ (𝑋↑2)) |
| 269 | 243, 246,
248, 268 | lemulge11d 12254 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 3 ≤ (3 · (𝑋↑2))) |
| 270 | | leneg 11819 |
. . . . . . . . . . 11
⊢ ((3
∈ ℝ ∧ (3 · (𝑋↑2)) ∈ ℝ) → (3 ≤ (3
· (𝑋↑2)) ↔
-(3 · (𝑋↑2))
≤ -3)) |
| 271 | 270 | biimpa 482 |
. . . . . . . . . 10
⊢ (((3
∈ ℝ ∧ (3 · (𝑋↑2)) ∈ ℝ) ∧ 3 ≤ (3
· (𝑋↑2)))
→ -(3 · (𝑋↑2)) ≤ -3) |
| 272 | 243, 245,
269, 271 | syl21anc 851 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -(3 · (𝑋↑2)) ≤
-3) |
| 273 | 242, 272 | eqbrtrd 5127 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ( -3 · (𝑋↑2)) ≤
-3) |
| 274 | 217, 218,
230, 222, 239, 273 | le2addd 11935 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ((𝑋↑3) + ( -3 · (𝑋↑2))) ≤ ( -1 + -3)) |
| 275 | | 1cnd 11302 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → 1 ∈
ℂ) |
| 276 | 275, 240 | negdid 11682 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -(1 + 3) = ( -1 +
-3)) |
| 277 | 275, 240 | addcomd 11512 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (1 + 3) = (3 +
1)) |
| 278 | | 3p1e4 12487 |
. . . . . . . . . 10
⊢ (3 + 1) =
4 |
| 279 | 277, 278 | eqtrdi 2812 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (1 + 3) =
4) |
| 280 | 279 | negeqd 11551 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -(1 + 3) =
-4) |
| 281 | 276, 280 | eqtr3d 2798 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ( -1 + -3) =
-4) |
| 282 | 274, 281 | breqtrd 5131 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ((𝑋↑3) + ( -3 · (𝑋↑2))) ≤ -4) |
| 283 | 224, 227,
219, 282 | leadd1dd 11930 |
. . . . 5
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (((𝑋↑3) + ( -3 · (𝑋↑2))) + 1) ≤ ( -4 +
1)) |
| 284 | 205 | adantr 486 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (𝑋↑3) ∈ ℂ) |
| 285 | 207 | adantr 486 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ( -3 · (𝑋↑2)) ∈
ℂ) |
| 286 | 284, 285,
275 | addassd 11331 |
. . . . 5
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → (((𝑋↑3) + ( -3 · (𝑋↑2))) + 1) = ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1))) |
| 287 | | ax-1cn 11258 |
. . . . . . . 8
⊢ 1 ∈
ℂ |
| 288 | 90, 287 | negsubdii 11643 |
. . . . . . 7
⊢ -(4
− 1) = ( -4 + 1) |
| 289 | | 4m1e3 12471 |
. . . . . . . 8
⊢ (4
− 1) = 3 |
| 290 | 289 | negeqi 11550 |
. . . . . . 7
⊢ -(4
− 1) = -3 |
| 291 | 288, 290 | eqtr3i 2786 |
. . . . . 6
⊢ ( -4 + 1)
= -3 |
| 292 | 291 | a1i 11 |
. . . . 5
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ( -4 + 1) =
-3) |
| 293 | 283, 286,
292 | 3brtr3d 5136 |
. . . 4
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≤ -3) |
| 294 | 138 | adantr 486 |
. . . 4
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → -3 < 0) |
| 295 | 221, 222,
223, 293, 294 | lelttrd 11468 |
. . 3
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) < 0) |
| 296 | 295 | lt0ne0d 11881 |
. 2
⊢ ((𝜑 ∧ 𝑋 ≤ -1) → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |
| 297 | 216, 296,
229, 78 | ltlecasei 11418 |
1
⊢ (𝜑 → ((𝑋↑3) + (( -3 · (𝑋↑2)) + 1)) ≠ 0) |