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Re: Forcing a Derivative

> ...
> 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


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

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

Klaus G.

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