1. The problem statement, all variables and given/known data For what values of a are y=a^x and y=1+x tangent at x=0? Explain 2. Relevant equations y1=1+x y2=a^x y2'=a^xln(a) y1'=1 3. The attempt at a solution Since both equations are tangent at x=0 i set their derivatives equal to each other in hopes of getting a a^xln(a)=1 I then substitute x in that equation with 0 and end up with ln(a)=1. I end up with a = e. Is this correct?