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Theorem 2times 9330
Description: Two times a number. (Contributed by NM, 10-Oct-2004.) (Revised by Mario Carneiro, 27-May-2016.) (Proof shortened by AV, 26-Feb-2020.)
Assertion
Ref Expression
2times (𝐴 ∈ ℂ → (2 · 𝐴) = (𝐴 + 𝐴))

Proof of Theorem 2times
StepHypRef Expression
1 df-2 9261 . . 3 2 = (1 + 1)
21oveq1i 6038 . 2 (2 · 𝐴) = ((1 + 1) · 𝐴)
3 1p1times 8372 . 2 (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = (𝐴 + 𝐴))
42, 3eqtrid 2276 1 (𝐴 ∈ ℂ → (2 · 𝐴) = (𝐴 + 𝐴))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1398  wcel 2202  (class class class)co 6028  cc 8090  1c1 8093   + caddc 8095   · cmul 8097  2c2 9253
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 2213  ax-resscn 8184  ax-1cn 8185  ax-icn 8187  ax-addcl 8188  ax-mulcl 8190  ax-mulcom 8193  ax-mulass 8195  ax-distr 8196  ax-1rid 8199  ax-cnre 8203
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rex 2517  df-v 2805  df-un 3205  df-in 3207  df-ss 3214  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-br 4094  df-iota 5293  df-fv 5341  df-ov 6031  df-2 9261
This theorem is referenced by:  times2  9331  2timesi  9332  2txmxeqx  9334  2halves  9432  halfaddsub  9437  avglt2  9443  2timesd  9446  expubnd  10921  subsq2  10972  sinmul  12385  sin2t  12390  cos2t  12391  pythagtriplem4  12921  pythagtriplem14  12930  pythagtriplem16  12932  pellexlem2  15792
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