Find power series representation for the function?

Find a power series representation for the function f(x) = 3x/(3x^2 +1)

I'm getting the sum of 3 * (-3)^n * x^(2n+1) but that seems to be wrong?

GusBsAs2013-03-28T08:26:40Z

Favorite Answer

Your result is ok, could be written
∑(n=0 to ∞) (-1)ⁿ 3ⁿ⁺¹ x²ⁿ⁺¹