Originally Posted by

**agent josh** Hi i am having issues with a question from a textbook.

The normal distribution with a mean 0 and standard deviation Q(i dont know how to do the correct sign) is given by y= e^ -(x/Q)^2 . Find and classify all stationary points and points of inflection for this function Q>0.

The main issue i have occurred is finding the first and second derivatives of this function.

My first derivative is coming out to be dy/dx = - 2xy/Q using logarithmic and implicit differentiation.

However this does not appear to be right. I dont see how i could find when f'(x)=0 to find my stationary points.

Thank you.