# problem in analysis of maximum likelihood function

#### george gill

Can someone introduce Leibnitz's theorem and show how it is used here. Would be great if one in addition to show how it is used here can add
a link to theory about the theorem. I did google it but I got a bit confused.

The rest of the theory is here just in case

#### romsek

Math Team
you've seen it just in a less complicated form, sometimes referred to as the fundamental rule of calculus.

$\dfrac{\partial}{\partial t}\displaystyle\int_{a(t)}^{b(t)}~f(x)~dx = f(b(t))\dfrac{db}{dt}-f(a(t))\dfrac{da}{dt}$

george gill