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Theorem 4t3lem 9852
Description: Lemma for 4t3e12 9853 and related theorems. (Contributed by Mario Carneiro, 19-Apr-2015.)
Hypotheses
Ref Expression
4t3lem.1 𝐴 ∈ ℕ0
4t3lem.2 𝐵 ∈ ℕ0
4t3lem.3 𝐶 = (𝐵 + 1)
4t3lem.4 (𝐴 · 𝐵) = 𝐷
4t3lem.5 (𝐷 + 𝐴) = 𝐸
Assertion
Ref Expression
4t3lem (𝐴 · 𝐶) = 𝐸

Proof of Theorem 4t3lem
StepHypRef Expression
1 4t3lem.3 . . 3 𝐶 = (𝐵 + 1)
21oveq2i 6086 . 2 (𝐴 · 𝐶) = (𝐴 · (𝐵 + 1))
3 4t3lem.1 . . . . . 6 𝐴 ∈ ℕ0
43nn0cni 9554 . . . . 5 𝐴 ∈ ℂ
5 4t3lem.2 . . . . . 6 𝐵 ∈ ℕ0
65nn0cni 9554 . . . . 5 𝐵 ∈ ℂ
7 ax-1cn 8262 . . . . 5 1 ∈ ℂ
84, 6, 7adddii 8326 . . . 4 (𝐴 · (𝐵 + 1)) = ((𝐴 · 𝐵) + (𝐴 · 1))
9 4t3lem.4 . . . . 5 (𝐴 · 𝐵) = 𝐷
104mulridi 8318 . . . . 5 (𝐴 · 1) = 𝐴
119, 10oveq12i 6087 . . . 4 ((𝐴 · 𝐵) + (𝐴 · 1)) = (𝐷 + 𝐴)
128, 11eqtri 2259 . . 3 (𝐴 · (𝐵 + 1)) = (𝐷 + 𝐴)
13 4t3lem.5 . . 3 (𝐷 + 𝐴) = 𝐸
1412, 13eqtri 2259 . 2 (𝐴 · (𝐵 + 1)) = 𝐸
152, 14eqtri 2259 1 (𝐴 · 𝐶) = 𝐸
Colors of variables: wff set class
Syntax hints:   = wceq 1402  wcel 2209  (class class class)co 6075  1c1 8170   + caddc 8172   · cmul 8174  0cn0 9542
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220  ax-sep 4244  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-mulcom 8270  ax-mulass 8272  ax-distr 8273  ax-1rid 8276  ax-rnegex 8278  ax-cnre 8280
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-br 4126  df-iota 5332  df-fv 5380  df-ov 6078  df-inn 9284  df-n0 9543
This theorem is referenced by:  4t3e12  9853  4t4e16  9854  5t2e10  9855  5t3e15  9856  5t4e20  9857  5t5e25  9858  6t3e18  9860  6t4e24  9861  6t5e30  9862  6t6e36  9863  7t3e21  9865  7t4e28  9866  7t5e35  9867  7t6e42  9868  7t7e49  9869  8t3e24  9871  8t4e32  9872  8t5e40  9873  8t6e48  9874  8t7e56  9875  8t8e64  9876  9t3e27  9878  9t4e36  9879  9t5e45  9880  9t6e54  9881  9t7e63  9882  9t8e72  9883  9t9e81  9884
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