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Feb14-04, 07:16 PM
Sci Advisor
PF Gold
Hurkyl's Avatar
P: 16,091
Proof of the formula for the nth derivative of a product

*shakes head* Bah, can't believe I missed that.

I bet the formula you gave is wrong. Try computing by hand the case where n = 2.

The right formula, and proof, looks almost exactly like the binomial theorem; have you seen a proof of that?