derivate(integrate(f(x))) <> f(x)!

• Subject: derivate(integrate(f(x))) <> f(x)!
• From: Patrick Gelin
• Date: Mon, 09 Jul 2007 08:38:09 +0200

Hi,

what I'm doing is:

f(x)=sin(x)^2*cos(x)^2

F(x)=integrate(f(x),x)=-1/3*cos(x)^3+2/5*cos(x)^5-1/7*cos(x)^7+C

and derivate(F(x),x) = cos(x)^6*sin(x) what is different from f(x)!

By the way, is it possible to look the differentes step of the calcul ?

Thank you for your help!

Patrick

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