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Theorem divdiv1 10034
Description: Division into a fraction. (Contributed by NM, 31-Dec-2007.)
Assertion
Ref Expression
divdiv1  |-  ( ( A  e.  CC  /\  ( B  e.  CC  /\  B  =/=  0 )  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  B )  /  C
)  =  ( A  /  ( B  x.  C ) ) )

Proof of Theorem divdiv1
StepHypRef Expression
1 ax-1cn 9332 . . . . 5  |-  1  e.  CC
2 ax-1ne0 9343 . . . . 5  |-  1  =/=  0
31, 2pm3.2i 455 . . . 4  |-  ( 1  e.  CC  /\  1  =/=  0 )
4 divdivdiv 10024 . . . 4  |-  ( ( ( A  e.  CC  /\  ( B  e.  CC  /\  B  =/=  0 ) )  /\  ( ( C  e.  CC  /\  C  =/=  0 )  /\  ( 1  e.  CC  /\  1  =/=  0 ) ) )  ->  (
( A  /  B
)  /  ( C  /  1 ) )  =  ( ( A  x.  1 )  / 
( B  x.  C
) ) )
53, 4mpanr2 684 . . 3  |-  ( ( ( A  e.  CC  /\  ( B  e.  CC  /\  B  =/=  0 ) )  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  B )  /  ( C  /  1 ) )  =  ( ( A  x.  1 )  / 
( B  x.  C
) ) )
653impa 1182 . 2  |-  ( ( A  e.  CC  /\  ( B  e.  CC  /\  B  =/=  0 )  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  B )  /  ( C  /  1 ) )  =  ( ( A  x.  1 )  / 
( B  x.  C
) ) )
7 div1 10015 . . . . 5  |-  ( C  e.  CC  ->  ( C  /  1 )  =  C )
87oveq2d 6102 . . . 4  |-  ( C  e.  CC  ->  (
( A  /  B
)  /  ( C  /  1 ) )  =  ( ( A  /  B )  /  C ) )
98ad2antrl 727 . . 3  |-  ( ( ( B  e.  CC  /\  B  =/=  0 )  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  B )  /  ( C  /  1 ) )  =  ( ( A  /  B )  /  C ) )
1093adant1 1006 . 2  |-  ( ( A  e.  CC  /\  ( B  e.  CC  /\  B  =/=  0 )  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  B )  /  ( C  /  1 ) )  =  ( ( A  /  B )  /  C ) )
11 mulid1 9375 . . . 4  |-  ( A  e.  CC  ->  ( A  x.  1 )  =  A )
1211oveq1d 6101 . . 3  |-  ( A  e.  CC  ->  (
( A  x.  1 )  /  ( B  x.  C ) )  =  ( A  / 
( B  x.  C
) ) )
13123ad2ant1 1009 . 2  |-  ( ( A  e.  CC  /\  ( B  e.  CC  /\  B  =/=  0 )  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  x.  1 )  /  ( B  x.  C )
)  =  ( A  /  ( B  x.  C ) ) )
146, 10, 133eqtr3d 2478 1  |-  ( ( A  e.  CC  /\  ( B  e.  CC  /\  B  =/=  0 )  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  B )  /  C
)  =  ( A  /  ( B  x.  C ) ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 369    /\ w3a 965    = wceq 1369    e. wcel 1756    =/= wne 2601  (class class class)co 6086   CCcc 9272   0cc0 9274   1c1 9275    x. cmul 9279    / cdiv 9985
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1591  ax-4 1602  ax-5 1670  ax-6 1708  ax-7 1728  ax-8 1758  ax-9 1760  ax-10 1775  ax-11 1780  ax-12 1792  ax-13 1943  ax-ext 2419  ax-sep 4408  ax-nul 4416  ax-pow 4465  ax-pr 4526  ax-un 6367  ax-resscn 9331  ax-1cn 9332  ax-icn 9333  ax-addcl 9334  ax-addrcl 9335  ax-mulcl 9336  ax-mulrcl 9337  ax-mulcom 9338  ax-addass 9339  ax-mulass 9340  ax-distr 9341  ax-i2m1 9342  ax-1ne0 9343  ax-1rid 9344  ax-rnegex 9345  ax-rrecex 9346  ax-cnre 9347  ax-pre-lttri 9348  ax-pre-lttrn 9349  ax-pre-ltadd 9350  ax-pre-mulgt0 9351
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3or 966  df-3an 967  df-tru 1372  df-ex 1587  df-nf 1590  df-sb 1701  df-eu 2256  df-mo 2257  df-clab 2425  df-cleq 2431  df-clel 2434  df-nfc 2563  df-ne 2603  df-nel 2604  df-ral 2715  df-rex 2716  df-reu 2717  df-rmo 2718  df-rab 2719  df-v 2969  df-sbc 3182  df-csb 3284  df-dif 3326  df-un 3328  df-in 3330  df-ss 3337  df-nul 3633  df-if 3787  df-pw 3857  df-sn 3873  df-pr 3875  df-op 3879  df-uni 4087  df-br 4288  df-opab 4346  df-mpt 4347  df-id 4631  df-po 4636  df-so 4637  df-xp 4841  df-rel 4842  df-cnv 4843  df-co 4844  df-dm 4845  df-rn 4846  df-res 4847  df-ima 4848  df-iota 5376  df-fun 5415  df-fn 5416  df-f 5417  df-f1 5418  df-fo 5419  df-f1o 5420  df-fv 5421  df-riota 6047  df-ov 6089  df-oprab 6090  df-mpt2 6091  df-er 7093  df-en 7303  df-dom 7304  df-sdom 7305  df-pnf 9412  df-mnf 9413  df-xr 9414  df-ltxr 9415  df-le 9416  df-sub 9589  df-neg 9590  df-div 9986
This theorem is referenced by:  recdiv2  10036  divdiv1d  10130  fldiv2  11692  sin01bnd  13461  pythagtriplem12  13885  pythagtriplem14  13887  pythagtriplem16  13889  coseq1  21959  efeq1  21960  ang180lem1  22180  atan1  22298  fsumdvdscom  22500  bposlem8  22605  rplogsumlem2  22709  dchrvmasum2lem  22720  dchrisum0lem2  22742  dchrisum0lem3  22743  mulogsum  22756  mulog2sumlem2  22759  pntlemr  22826  pntlemf  22829  wallispilem4  29816
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