Finding maximum and minimum of the first Gaussian derivative

[Cosmossos]

Hello
I need to find the maximum and minimum points of the first gaussian derivative and then get the peak to peak height. but I got that only the zero point and didn't got the other two.
please help me...
thanks

 

[I like Serena]

Hail supergalactic Cosmossos!

To find the minima and maxima of a function, you need to take the derivative and solve it for being equal to zero.

What is the derivative of the first Gaussian derivative?