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Theorem 1p1times 8409
Description: Two times a number. (Contributed by NM, 18-May-1999.) (Revised by Mario Carneiro, 27-May-2016.)
Assertion
Ref Expression
1p1times (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = (𝐴 + 𝐴))

Proof of Theorem 1p1times
StepHypRef Expression
1 ax-1cn 8222 . . . 4 1 ∈ ℂ
21a1i 9 . . 3 (𝐴 ∈ ℂ → 1 ∈ ℂ)
3 id 19 . . 3 (𝐴 ∈ ℂ → 𝐴 ∈ ℂ)
42, 2, 3adddird 8301 . 2 (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = ((1 · 𝐴) + (1 · 𝐴)))
5 mullid 8274 . . 3 (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴)
65, 5oveq12d 6070 . 2 (𝐴 ∈ ℂ → ((1 · 𝐴) + (1 · 𝐴)) = (𝐴 + 𝐴))
74, 6eqtrd 2267 1 (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = (𝐴 + 𝐴))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1398  wcel 2205  (class class class)co 6052  cc 8127  1c1 8130   + caddc 8132   · cmul 8134
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216  ax-resscn 8221  ax-1cn 8222  ax-icn 8224  ax-addcl 8225  ax-mulcl 8227  ax-mulcom 8230  ax-mulass 8232  ax-distr 8233  ax-1rid 8236  ax-cnre 8240
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-un 3217  df-in 3219  df-ss 3226  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-br 4112  df-iota 5314  df-fv 5362  df-ov 6055
This theorem is referenced by:  eqneg  9008  2times  9367
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