resqrtvalex - Mathbox for Richard Penner

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Theorem resqrtvalex 43607

Description: Example for resqrtval 43605. (Contributed by RP, 21-May-2024.)

**Assertion**
Ref	Expression
resqrtvalex	⊢ (ℜ‘(√‘(;15 + (i · 8)))) = 4

**Proof of Theorem resqrtvalex**
Step	Hyp	Ref	Expression
1		1nn0 12569	. . . . . 6 ⊢ 1 ∈ ℕ₀
2		5nn0 12573	. . . . . 6 ⊢ 5 ∈ ℕ₀
3	1, 2	deccl 12773	. . . . 5 ⊢ ;15 ∈ ℕ₀
4	3	nn0cni 12565	. . . 4 ⊢ ;15 ∈ ℂ
5		ax-icn 11243	. . . . 5 ⊢ i ∈ ℂ
6		8cn 12390	. . . . 5 ⊢ 8 ∈ ℂ
7	5, 6	mulcli 11297	. . . 4 ⊢ (i · 8) ∈ ℂ
8	4, 7	addcli 11296	. . 3 ⊢ (;15 + (i · 8)) ∈ ℂ
9		resqrtval 43605	. . 3 ⊢ ((;15 + (i · 8)) ∈ ℂ → (ℜ‘(√‘(;15 + (i · 8)))) = (√‘(((abs‘(;15 + (i · 8))) + (ℜ‘(;15 + (i · 8)))) / 2)))
10	8, 9	ax-mp 5	. 2 ⊢ (ℜ‘(√‘(;15 + (i · 8)))) = (√‘(((abs‘(;15 + (i · 8))) + (ℜ‘(;15 + (i · 8)))) / 2))
11		7nn0 12575	. . . . . 6 ⊢ 7 ∈ ℕ₀
12	3	nn0rei 12564	. . . . . . . 8 ⊢ ;15 ∈ ℝ
13		8re 12389	. . . . . . . 8 ⊢ 8 ∈ ℝ
14		absreim 15342	. . . . . . . 8 ⊢ ((;15 ∈ ℝ ∧ 8 ∈ ℝ) → (abs‘(;15 + (i · 8))) = (√‘((;15↑2) + (8↑2))))
15	12, 13, 14	mp2an 691	. . . . . . 7 ⊢ (abs‘(;15 + (i · 8))) = (√‘((;15↑2) + (8↑2)))
16	4	sqvali 14229	. . . . . . . . . . 11 ⊢ (;15↑2) = (;15 · ;15)
17		eqid 2740	. . . . . . . . . . . 12 ⊢ ;15 = ;15
18	4	mullidi 11295	. . . . . . . . . . . . 13 ⊢ (1 · ;15) = ;15
19		1p1e2 12418	. . . . . . . . . . . . 13 ⊢ (1 + 1) = 2
20		2nn0 12570	. . . . . . . . . . . . 13 ⊢ 2 ∈ ℕ₀
21	11	nn0cni 12565	. . . . . . . . . . . . . 14 ⊢ 7 ∈ ℂ
22	2	nn0cni 12565	. . . . . . . . . . . . . 14 ⊢ 5 ∈ ℂ
23		7p5e12 12835	. . . . . . . . . . . . . 14 ⊢ (7 + 5) = ;12
24	21, 22, 23	addcomli 11482	. . . . . . . . . . . . 13 ⊢ (5 + 7) = ;12
25	1, 2, 11, 18, 19, 20, 24	decaddci 12819	. . . . . . . . . . . 12 ⊢ ((1 · ;15) + 7) = ;22
26	22	mulridi 11294	. . . . . . . . . . . . . . 15 ⊢ (5 · 1) = 5
27	26	oveq1i 7458	. . . . . . . . . . . . . 14 ⊢ ((5 · 1) + 2) = (5 + 2)
28		5p2e7 12449	. . . . . . . . . . . . . 14 ⊢ (5 + 2) = 7
29	27, 28	eqtri 2768	. . . . . . . . . . . . 13 ⊢ ((5 · 1) + 2) = 7
30		5t5e25 12861	. . . . . . . . . . . . 13 ⊢ (5 · 5) = ;25
31	2, 1, 2, 17, 2, 20, 29, 30	decmul2c 12824	. . . . . . . . . . . 12 ⊢ (5 · ;15) = ;75
32	3, 1, 2, 17, 2, 11, 25, 31	decmul1c 12823	. . . . . . . . . . 11 ⊢ (;15 · ;15) = ;;225
33	16, 32	eqtri 2768	. . . . . . . . . 10 ⊢ (;15↑2) = ;;225
34	6	sqvali 14229	. . . . . . . . . . 11 ⊢ (8↑2) = (8 · 8)
35		8t8e64 12879	. . . . . . . . . . 11 ⊢ (8 · 8) = ;64
36	34, 35	eqtri 2768	. . . . . . . . . 10 ⊢ (8↑2) = ;64
37	33, 36	oveq12i 7460	. . . . . . . . 9 ⊢ ((;15↑2) + (8↑2)) = (;;225 + ;64)
38	20, 20	deccl 12773	. . . . . . . . . 10 ⊢ ;22 ∈ ℕ₀
39		6nn0 12574	. . . . . . . . . 10 ⊢ 6 ∈ ℕ₀
40		4nn0 12572	. . . . . . . . . 10 ⊢ 4 ∈ ℕ₀
41		eqid 2740	. . . . . . . . . 10 ⊢ ;;225 = ;;225
42		eqid 2740	. . . . . . . . . 10 ⊢ ;64 = ;64
43		eqid 2740	. . . . . . . . . . 11 ⊢ ;22 = ;22
44	39	nn0cni 12565	. . . . . . . . . . . 12 ⊢ 6 ∈ ℂ
45		2cn 12368	. . . . . . . . . . . 12 ⊢ 2 ∈ ℂ
46		6p2e8 12452	. . . . . . . . . . . 12 ⊢ (6 + 2) = 8
47	44, 45, 46	addcomli 11482	. . . . . . . . . . 11 ⊢ (2 + 6) = 8
48	20, 20, 39, 43, 47	decaddi 12818	. . . . . . . . . 10 ⊢ (;22 + 6) = ;28
49		5p4e9 12451	. . . . . . . . . 10 ⊢ (5 + 4) = 9
50	38, 2, 39, 40, 41, 42, 48, 49	decadd 12812	. . . . . . . . 9 ⊢ (;;225 + ;64) = ;;289
51	1, 11	deccl 12773	. . . . . . . . . . . 12 ⊢ ;17 ∈ ℕ₀
52	51	nn0cni 12565	. . . . . . . . . . 11 ⊢ ;17 ∈ ℂ
53	52	sqvali 14229	. . . . . . . . . 10 ⊢ (;17↑2) = (;17 · ;17)
54		eqid 2740	. . . . . . . . . . 11 ⊢ ;17 = ;17
55		9nn0 12577	. . . . . . . . . . 11 ⊢ 9 ∈ ℕ₀
56	1, 1	deccl 12773	. . . . . . . . . . 11 ⊢ ;11 ∈ ℕ₀
57	52	mullidi 11295	. . . . . . . . . . . 12 ⊢ (1 · ;17) = ;17
58		eqid 2740	. . . . . . . . . . . 12 ⊢ ;11 = ;11
59		7p1e8 12442	. . . . . . . . . . . 12 ⊢ (7 + 1) = 8
60	1, 11, 1, 1, 57, 58, 19, 59	decadd 12812	. . . . . . . . . . 11 ⊢ ((1 · ;17) + ;11) = ;28
61	21	mulridi 11294	. . . . . . . . . . . . . 14 ⊢ (7 · 1) = 7
62	61	oveq1i 7458	. . . . . . . . . . . . 13 ⊢ ((7 · 1) + 4) = (7 + 4)
63		7p4e11 12834	. . . . . . . . . . . . 13 ⊢ (7 + 4) = ;11
64	62, 63	eqtri 2768	. . . . . . . . . . . 12 ⊢ ((7 · 1) + 4) = ;11
65		7t7e49 12872	. . . . . . . . . . . 12 ⊢ (7 · 7) = ;49
66	11, 1, 11, 54, 55, 40, 64, 65	decmul2c 12824	. . . . . . . . . . 11 ⊢ (7 · ;17) = ;;119
67	51, 1, 11, 54, 55, 56, 60, 66	decmul1c 12823	. . . . . . . . . 10 ⊢ (;17 · ;17) = ;;289
68	53, 67	eqtr2i 2769	. . . . . . . . 9 ⊢ ;;289 = (;17↑2)
69	37, 50, 68	3eqtri 2772	. . . . . . . 8 ⊢ ((;15↑2) + (8↑2)) = (;17↑2)
70	69	fveq2i 6923	. . . . . . 7 ⊢ (√‘((;15↑2) + (8↑2))) = (√‘(;17↑2))
71	51	nn0ge0i 12580	. . . . . . . 8 ⊢ 0 ≤ ;17
72	51	nn0rei 12564	. . . . . . . . 9 ⊢ ;17 ∈ ℝ
73	72	sqrtsqi 15423	. . . . . . . 8 ⊢ (0 ≤ ;17 → (√‘(;17↑2)) = ;17)
74	71, 73	ax-mp 5	. . . . . . 7 ⊢ (√‘(;17↑2)) = ;17
75	15, 70, 74	3eqtri 2772	. . . . . 6 ⊢ (abs‘(;15 + (i · 8))) = ;17
76	12, 13	crrei 15241	. . . . . 6 ⊢ (ℜ‘(;15 + (i · 8))) = ;15
77	19	oveq1i 7458	. . . . . . 7 ⊢ ((1 + 1) + 1) = (2 + 1)
78		2p1e3 12435	. . . . . . 7 ⊢ (2 + 1) = 3
79	77, 78	eqtri 2768	. . . . . 6 ⊢ ((1 + 1) + 1) = 3
80	1, 11, 1, 2, 75, 76, 79, 20, 23	decaddc 12813	. . . . 5 ⊢ ((abs‘(;15 + (i · 8))) + (ℜ‘(;15 + (i · 8)))) = ;32
81	80	oveq1i 7458	. . . 4 ⊢ (((abs‘(;15 + (i · 8))) + (ℜ‘(;15 + (i · 8)))) / 2) = (;32 / 2)
82		eqid 2740	. . . . . 6 ⊢ ;16 = ;16
83	45	mulridi 11294	. . . . . . . 8 ⊢ (2 · 1) = 2
84	83	oveq1i 7458	. . . . . . 7 ⊢ ((2 · 1) + 1) = (2 + 1)
85	84, 78	eqtri 2768	. . . . . 6 ⊢ ((2 · 1) + 1) = 3
86		6t2e12 12862	. . . . . . 7 ⊢ (6 · 2) = ;12
87	44, 45, 86	mulcomli 11299	. . . . . 6 ⊢ (2 · 6) = ;12
88	20, 1, 39, 82, 20, 1, 85, 87	decmul2c 12824	. . . . 5 ⊢ (2 · ;16) = ;32
89		3nn0 12571	. . . . . . . 8 ⊢ 3 ∈ ℕ₀
90	89, 20	deccl 12773	. . . . . . 7 ⊢ ;32 ∈ ℕ₀
91	90	nn0cni 12565	. . . . . 6 ⊢ ;32 ∈ ℂ
92	1, 39	deccl 12773	. . . . . . 7 ⊢ ;16 ∈ ℕ₀
93	92	nn0cni 12565	. . . . . 6 ⊢ ;16 ∈ ℂ
94		2ne0 12397	. . . . . 6 ⊢ 2 ≠ 0
95	91, 45, 93, 94	divmuli 12048	. . . . 5 ⊢ ((;32 / 2) = ;16 ↔ (2 · ;16) = ;32)
96	88, 95	mpbir 231	. . . 4 ⊢ (;32 / 2) = ;16
97	40	nn0cni 12565	. . . . . 6 ⊢ 4 ∈ ℂ
98	97	sqvali 14229	. . . . 5 ⊢ (4↑2) = (4 · 4)
99		4t4e16 12857	. . . . 5 ⊢ (4 · 4) = ;16
100	98, 99	eqtr2i 2769	. . . 4 ⊢ ;16 = (4↑2)
101	81, 96, 100	3eqtri 2772	. . 3 ⊢ (((abs‘(;15 + (i · 8))) + (ℜ‘(;15 + (i · 8)))) / 2) = (4↑2)
102	101	fveq2i 6923	. 2 ⊢ (√‘(((abs‘(;15 + (i · 8))) + (ℜ‘(;15 + (i · 8)))) / 2)) = (√‘(4↑2))
103	40	nn0ge0i 12580	. . 3 ⊢ 0 ≤ 4
104	40	nn0rei 12564	. . . 4 ⊢ 4 ∈ ℝ
105	104	sqrtsqi 15423	. . 3 ⊢ (0 ≤ 4 → (√‘(4↑2)) = 4)
106	103, 105	ax-mp 5	. 2 ⊢ (√‘(4↑2)) = 4
107	10, 102, 106	3eqtri 2772	1 ⊢ (ℜ‘(√‘(;15 + (i · 8)))) = 4

Colors of variables: wff setvar class

Syntax hints: = wceq 1537 ∈ wcel 2108 class class class wbr 5166 ‘cfv 6573 (class class class)co 7448 ℂcc 11182 ℝcr 11183 0cc0 11184 1c1 11185 ici 11186 + caddc 11187 · cmul 11189 ≤ cle 11325 / cdiv 11947 2c2 12348 3c3 12349 4c4 12350 5c5 12351 6c6 12352 7c7 12353 8c8 12354 9c9 12355 cdc 12758 ↑cexp 14112 ℜcre 15146 √csqrt 15282 abscabs 15283

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-cnex 11240 ax-resscn 11241 ax-1cn 11242 ax-icn 11243 ax-addcl 11244 ax-addrcl 11245 ax-mulcl 11246 ax-mulrcl 11247 ax-mulcom 11248 ax-addass 11249 ax-mulass 11250 ax-distr 11251 ax-i2m1 11252 ax-1ne0 11253 ax-1rid 11254 ax-rnegex 11255 ax-rrecex 11256 ax-cnre 11257 ax-pre-lttri 11258 ax-pre-lttrn 11259 ax-pre-ltadd 11260 ax-pre-mulgt0 11261 ax-pre-sup 11262

This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-rmo 3388 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-pss 3996 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-tr 5284 df-id 5593 df-eprel 5599 df-po 5607 df-so 5608 df-fr 5652 df-we 5654 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-pred 6332 df-ord 6398 df-on 6399 df-lim 6400 df-suc 6401 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-riota 7404 df-ov 7451 df-oprab 7452 df-mpo 7453 df-om 7904 df-2nd 8031 df-frecs 8322 df-wrecs 8353 df-recs 8427 df-rdg 8466 df-er 8763 df-en 9004 df-dom 9005 df-sdom 9006 df-sup 9511 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11522 df-neg 11523 df-div 11948 df-nn 12294 df-2 12356 df-3 12357 df-4 12358 df-5 12359 df-6 12360 df-7 12361 df-8 12362 df-9 12363 df-n0 12554 df-z 12640 df-dec 12759 df-uz 12904 df-rp 13058 df-seq 14053 df-exp 14113 df-cj 15148 df-re 15149 df-im 15150 df-sqrt 15284 df-abs 15285

This theorem is referenced by: (None)

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