TÌM NGUYÊN HÀM F(X) = −RX COS 2XDX.A. F(X) = 12 X SIN 2X + 14...

Câu 38. Tìm nguyên hàm F(x) = −

R

x cos 2xdx.

A.

F(x) = 1

2 x sin 2x + 1

4 cos 2x +C.

B.

F (x) = − 1

4 cos 2x +C.

C.

F(x) = 1

2 x sin 2x − 1

4 cos 2x +C.

D.

F (x) = − 1