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Why can't Mathematica find this root?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg38274] Why can't Mathematica find this root?
  • From: "Konrad Den Ende" <konrad at voxway.com>
  • Date: Tue, 10 Dec 2002 04:17:16 -0500 (EST)
  • Organization: Gothenburg University
  • Sender: owner-wri-mathgroup at wolfram.com

Regard this function:

f[x_] := Sin[x]^3 * Cos[x]

And then try this:

Solve[f'[x] == 0, x]

and you'll get a list of all roots but one. I wonder why.

By regarding f'[x] one can directly see that x = pi is a root,

yet, Mathematica fails to see it...


Vänligen
Konrad
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