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>