1. The problem statement, all variables and given/known data Hello - I have been messing around with this problem for a while, please help. I actually know the solution, but cannot reach it on paper: Find where the slope of the tangent to the curve e^(-x^2) is equal to 2/e 3. The attempt at a solution d/dx e^(-x^2) = e^(-x^2) * d/dx -x^2 = -2xe^(-x^2) Set: -2xe^(-x^2) = 2/e e^(-x^2 + 1) = -1/x (e^(-x^2 + 1))^-1 = (-1/x)^-1 e^(x^2-1) = -x At this point I can see that the only possible solution is x = -1, yet cannot actually reach that conclusion on paper. It seems like I'm missing something ridiculously simple. Any help greatly appreciated!