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Full simplify problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg122261] Full simplify problem
  • From: "A. Lapraitis" <ffcitatos at gmail.com>
  • Date: Sat, 22 Oct 2011 06:09:48 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
Hello,

Could anyone explain why the following does not give zero?

In[72]:= Assuming[
 x == y + z,
 FullSimplify[
  E^x - E^(y + z)
  ]
 ]

Out[72]= E^x - E^(y + z)

Thanks!
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