Question

Find the derivative of the function

Answer 1

$f(x)=-2x^3+5\sin(x)\\\\f'(x)=(-2x^3+5\sin(x))'=(-2x^3)'+(5\sin(x))'\\\\=3\cdot(-2x^2)+5\cdot\cos(x)=-6x^2+5\cos(x)\to D.$