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Forcing a Derivative

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

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

For example if ...

f[x_] = x^2 + 7

g[x_]=3x^3 + 23


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

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