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Re: Forcing a Derivative

• To: mathgroup at smc.vnet.net
• Subject: [mg50778] Re: Forcing a Derivative
• From: Karl_boehme_9 at msn.com (Klaus G)
• Date: Sun, 19 Sep 2004 21:39:59 -0400 (EDT)
• References: <cijej8$hlp$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

> ...
> 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

Hi,

f is NOT f[x], so please try:

deriv = D[f[x]*g[x], {x, 2}]
Collect[deriv, x]

regards
Klaus G.

• Follow-Ups:
  • Re: Re: Forcing a Derivative
    • From: Murray Eisenberg <murray@math.umass.edu>