1. The problem statement, all variables and given/known data Obtain the first derivative of 10x by the limit definition. 2. Relevant equations f'(x)=limh->0 f(x+h)-f(x)/h 3. The attempt at a solution f'(x)=limh->0 10x+h-10x/h I also know that h=1 as x approaches 0. Now, how do I make it so that you aren't dividing by h=0.