If f′(x)=x2+2f'(x) = x^2 + 2f′(x)=x2+2 and f(0)=5f(0) = 5f(0)=5, what is f(x)f(x)f(x)?
x3/3+2x+5x^3/3 + 2x + 5x3/3+2x+5
x3/2+2x+5x^3/2 + 2x + 5x3/2+2x+5
2x+52x + 52x+5
x2/2+2xx^2/2 + 2xx2/2+2x