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Theorem divsubdir 10246
Description: Distribution of division over subtraction. (Contributed by NM, 4-Mar-2005.)
Assertion
Ref Expression
divsubdir  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  -  B )  /  C
)  =  ( ( A  /  C )  -  ( B  /  C ) ) )

Proof of Theorem divsubdir
StepHypRef Expression
1 negcl 9825 . . . 4  |-  ( B  e.  CC  ->  -u B  e.  CC )
2 divdir 10236 . . . 4  |-  ( ( A  e.  CC  /\  -u B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  ->  ( ( A  +  -u B )  /  C )  =  ( ( A  /  C )  +  (
-u B  /  C
) ) )
31, 2syl3an2 1263 . . 3  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  +  -u B )  /  C
)  =  ( ( A  /  C )  +  ( -u B  /  C ) ) )
4 negsub 9872 . . . . 5  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( A  +  -u B )  =  ( A  -  B ) )
54oveq1d 6296 . . . 4  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( ( A  +  -u B )  /  C
)  =  ( ( A  -  B )  /  C ) )
653adant3 1017 . . 3  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  +  -u B )  /  C
)  =  ( ( A  -  B )  /  C ) )
73, 6eqtr3d 2486 . 2  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  C )  +  (
-u B  /  C
) )  =  ( ( A  -  B
)  /  C ) )
8 divneg 10245 . . . . . 6  |-  ( ( B  e.  CC  /\  C  e.  CC  /\  C  =/=  0 )  ->  -u ( B  /  C )  =  ( -u B  /  C ) )
983expb 1198 . . . . 5  |-  ( ( B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  ->  -u ( B  /  C )  =  ( -u B  /  C ) )
1093adant1 1015 . . . 4  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  ->  -u ( B  /  C
)  =  ( -u B  /  C ) )
1110oveq2d 6297 . . 3  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  C )  +  -u ( B  /  C
) )  =  ( ( A  /  C
)  +  ( -u B  /  C ) ) )
12 divcl 10219 . . . . . 6  |-  ( ( A  e.  CC  /\  C  e.  CC  /\  C  =/=  0 )  ->  ( A  /  C )  e.  CC )
13123expb 1198 . . . . 5  |-  ( ( A  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  ->  ( A  /  C )  e.  CC )
14133adant2 1016 . . . 4  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( A  /  C
)  e.  CC )
15 divcl 10219 . . . . . 6  |-  ( ( B  e.  CC  /\  C  e.  CC  /\  C  =/=  0 )  ->  ( B  /  C )  e.  CC )
16153expb 1198 . . . . 5  |-  ( ( B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  ->  ( B  /  C )  e.  CC )
17163adant1 1015 . . . 4  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( B  /  C
)  e.  CC )
1814, 17negsubd 9942 . . 3  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  C )  +  -u ( B  /  C
) )  =  ( ( A  /  C
)  -  ( B  /  C ) ) )
1911, 18eqtr3d 2486 . 2  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  /  C )  +  (
-u B  /  C
) )  =  ( ( A  /  C
)  -  ( B  /  C ) ) )
207, 19eqtr3d 2486 1  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  ( C  e.  CC  /\  C  =/=  0 ) )  -> 
( ( A  -  B )  /  C
)  =  ( ( A  /  C )  -  ( B  /  C ) ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 369    /\ w3a 974    = wceq 1383    e. wcel 1804    =/= wne 2638  (class class class)co 6281   CCcc 9493   0cc0 9495    + caddc 9498    - cmin 9810   -ucneg 9811    / cdiv 10212
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1605  ax-4 1618  ax-5 1691  ax-6 1734  ax-7 1776  ax-8 1806  ax-9 1808  ax-10 1823  ax-11 1828  ax-12 1840  ax-13 1985  ax-ext 2421  ax-sep 4558  ax-nul 4566  ax-pow 4615  ax-pr 4676  ax-un 6577  ax-resscn 9552  ax-1cn 9553  ax-icn 9554  ax-addcl 9555  ax-addrcl 9556  ax-mulcl 9557  ax-mulrcl 9558  ax-mulcom 9559  ax-addass 9560  ax-mulass 9561  ax-distr 9562  ax-i2m1 9563  ax-1ne0 9564  ax-1rid 9565  ax-rnegex 9566  ax-rrecex 9567  ax-cnre 9568  ax-pre-lttri 9569  ax-pre-lttrn 9570  ax-pre-ltadd 9571  ax-pre-mulgt0 9572
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3or 975  df-3an 976  df-tru 1386  df-ex 1600  df-nf 1604  df-sb 1727  df-eu 2272  df-mo 2273  df-clab 2429  df-cleq 2435  df-clel 2438  df-nfc 2593  df-ne 2640  df-nel 2641  df-ral 2798  df-rex 2799  df-reu 2800  df-rmo 2801  df-rab 2802  df-v 3097  df-sbc 3314  df-csb 3421  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-nul 3771  df-if 3927  df-pw 3999  df-sn 4015  df-pr 4017  df-op 4021  df-uni 4235  df-br 4438  df-opab 4496  df-mpt 4497  df-id 4785  df-po 4790  df-so 4791  df-xp 4995  df-rel 4996  df-cnv 4997  df-co 4998  df-dm 4999  df-rn 5000  df-res 5001  df-ima 5002  df-iota 5541  df-fun 5580  df-fn 5581  df-f 5582  df-f1 5583  df-fo 5584  df-f1o 5585  df-fv 5586  df-riota 6242  df-ov 6284  df-oprab 6285  df-mpt2 6286  df-er 7313  df-en 7519  df-dom 7520  df-sdom 7521  df-pnf 9633  df-mnf 9634  df-xr 9635  df-ltxr 9636  df-le 9637  df-sub 9812  df-neg 9813  df-div 10213
This theorem is referenced by:  divsubdird  10365  1mhlfehlf  10764  halfpm6th  10766  halfaddsub  10778  zeo  10954  quoremz  11961  quoremnn0ALT  11963  facndiv  12345  cos2bnd  13800  rpnnen2lem3  13827  rpnnen2lem11  13835  pythagtriplem15  14230  ovolscalem1  21797  sinq12gt0  22772  sincos6thpi  22780  ang180lem2  23014  log2cnv  23147  log2tlbnd  23148  basellem3  23228  ppiub  23351  logfacrlim  23371  logexprlim  23372  bposlem8  23438  chtppilimlem1  23530  vmadivsum  23539  rplogsumlem2  23542  rpvmasumlem  23544  rplogsum  23584  mulog2sumlem1  23591  selberg2lem  23607  selberg2  23608  selbergr  23625  pntlemr  23659  pntlemj  23660  ballotth  28349  subdivcomb1  28978  subdivcomb2  28979  bpoly3  29795  nndivsub  29897  heiborlem6  30287  areaquad  31160  lhe4.4ex1a  31210  stirlinglem10  31754
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