# Leibniz integral rule proof ?

1. Sep 27, 2004

### quasar987

Leibniz integral rule "proof"?

Does anyone know how to get the Leibniz integral rule (a.k.a. differentiation under the integral sign)? I'm clueless.

It can be found here

http://mathworld.wolfram.com/LeibnizIntegralRule.html

2. Sep 28, 2004

### Ethereal

3. Sep 28, 2004

### quasar987

Very nice! Thanks Ethereal.

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