7. How could we find a power series representation for f(r) = In(1 + x)? A. Integrate the power series representation for f (r) = In(1 + r) B. Integrate the power series representation for f(x) = 1+x C. Take the derivative of the power series representation for f(x) = In(1 + x) 1 D. Take the derivative of the power series representation for f(x) = In 1+x E. None of the other choices