I'm asked to find the critical numbers of f(x)=2((e^-x)-(e^-2x))
I know you have to find the derivative first which I got:
But now, how do I go about finding one of the x? I believe you must rewrite it as a quadratic function but since the exponent is -2 indicating it is a reciprocal.
Factoring: Divided by 4
I can set ((1/e^x)-(1/2))=0 which will be x = ln 2
But when it comes to (1/e^x)=0 I'm at a COMPLETE LOSS. How do I do this?
Thank you in advance