1. The problem statement, all variables and given/known data A curve has equation y=e^2x-x^2+x-3 , find value of x for which d^2y/dx^2=0. 2. Relevant equations 3. The attempt at a solution well. i started by finding out the 1st and 2nd derivative: y=e^2x-x^2+x-3 dy/dx= 2e2^x-2x+1 and d2y/dx2=4e^2x-2 = 0 dy/dx =>2e^2x=2x-1 =>e^2x = 2x/2 -1/2 e2x= x-1/2 (1) sub. value (1) into: d2y/dx2. 4e^2x-2= 0 e^2x = 1/2 e^2x = 1/2 (x-1/2) no idea.. on what to do now =/. Thanks in adv.