f(x)=4x/(7+x). Find the first few coefficients and radius of convergence sum (n=0 to infinity) CnX^n 3. The attempt at a solution I set up the equation into the form of a power series and got: (-1)^n*(4)^n*(x/7)^(n+1) But that doesn't seem to be right because I can't get the coefficients right. I know the first one is 0, but what I have doesn't give me that. the RoC is 7. What am I doing wrong?