If ddx[H(x)]=x2\frac{d}{dx} [H(x)] = x^2dxd[H(x)]=x2, which of the following is true regarding H(x)H(x)H(x)?
H(x)=x3+CH(x) = x^3 + CH(x)=x3+C
H(x)=13x3+CH(x) = \frac{1}{3}x^3 + CH(x)=31x3+C
H(x)=2x+CH(x) = 2x + CH(x)=2x+C
H(x)=12x2+CH(x) = \frac{1}{2}x^2 + CH(x)=21x2+C