I have a problem as follows:

An electron moving along the x axis has a position given by x=17te^-1.1t meters where t is in seconds. How far is the electron from the origin when it momentarily stops.

Now I know that I need to take the derivative of the position function to find the velocity, and then set that equal to zero. For some reason I'm having trouble figuring out the derivative of the given position function.

Any help would be greatly appreciated.