Which of the following statements is/are correct?

Options

A. `(d)/(dx)(x^(2)+2)^(2)=4x`
B. `(d)/(dx)(e^(-2x))=-2e^(-2x)`
C. `(d)/(dx){sin(ax+b)}=acos(ax+b)`
D. `(d)/(dx)(x^(3)+3x+1)^(2)=2(3x^(2)+3)(x^(3)+3x+1)`

Answer

B, C, D