You are correct, but how did you determine this...what did you get for the derivative?
Hey, could someone please guide me as to what to do next in this problem. Thanks!
f(x) = xe^{-(x^2)/2}
Determine the intervals where f is increasing and where f is decreasing.
I've worked out the derivative, but am unsure how to proceed.
Update: I've worked out that the derivative is positive for -1 < x < 1 and negative for x > 1 and x < -1 ... but my working seems quite dodgy, just a bit of guidance would be great. Thanks.