RE: Integrate (deutsch)

*To*: MathGroup at yoda.physics.unc.edu*Subject*: RE: Integrate (deutsch)*From*: reiszig at e-technik.tu-dresden.dbp.de*Date*: Mon, 8 Mar 1993 16:47:49 +0100

------------------------------ Start of body part 1 Hallo, Mr. Deutsch had a problem concerning Integrate (see below). The reason for Simplify not to change the form of Out[1] into 1/4 (x + c)^4 is that Out[1] is different from that. Try Integrate[ (xx + c)^3,{xx,-c,x}], maybe a Factor is needed thereafter. G. Reiszig, Dresden, 8 Mar 93 Mr. Deutsch's mail: ------------------------------ Start of body part 2 - OSITEL/400 message - SubmissionTime: 04/03/93-22:00:57 DeliveryTime: 06/03/93-09:20:55 Originator: C=de;A=dbp;P=edu;O=bu;OU=bu-pub;S=deutsch PrimaryRecipients: C=de;A=dbp;P=edu;O=unc;OU=physics;OU=yoda;S=mathgroup Subject: Integrate Importance: normal Hello Mathgroup, I have a question which I suspect has been discussed before. Is there a reason why Integrate[ (x + c)^3, x ] does not return (x + c)^4 --------- 4 Instead here is the result: Mathematica 2.0 for SPARC Copyright 1988-91 Wolfram Research, Inc. -- X11 windows graphics initialized -- In[1]:= Integrate[ (x + c)^3, x ] 2 2 4 3 3 c x 3 x Out[1]= c x + ------- + c x + -- 2 4 In[2]:= Simplify[%] 2 2 4 3 3 c x 3 x Out[2]= c x + ------- + c x + -- 2 4 In[3]:= D[%,x] 3 2 2 3 Out[3]= c + 3 c x + 3 c x + x In[4]:= Simplify[%] 3 Out[4]= (c + x) Clearly, the output Out[1] is correct but is there some way to force Out[1] to look like: (x + c)^4 --------- 4 Simplify, doesn't seem to do the job either. David Deutsch Information Technology Boston University deutsch at it.bu.edu