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Forcing a Derivative

• To: mathgroup at smc.vnet.net
• Subject: [mg50753] Forcing a Derivative
• From: "Scott Guthery" <sguthery at mobile-mind.com>
• Date: Sun, 19 Sep 2004 03:56:01 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

How does one force Derivative[n] to actually take the derivative?

For example if ...

f[x_] = x^2 + 7

g[x_]=3x^3 + 23

then

Derivative[2][f * g]

just puts a couple of primes on the product rather than actually computing the dervative.

Thanks for any insight.

Cheers, Scott

• Follow-Ups:
  • Re: Forcing a Derivative
    • From: DrBob <drbob@bigfoot.com>
  • Re: Forcing a Derivative
    • From: Andrzej Kozlowski <andrzej@akikoz.net>