What is the derivative of a constant times a function, ddx[cf(x)]\frac{d}{dx}[cf(x)]dxd[cf(x)]?
c⋅f′(x)c \cdot f'(x)c⋅f′(x)
c+f′(x)c + f'(x)c+f′(x)
f′(cx)f'(cx)f′(cx)
c⋅f(x)c \cdot f(x)c⋅f(x)