NẾU F X DX 1 LN 5X C X 1 1.1 LN 5 .1 1 . C. 2A. ...
Câu 17: Nếu f x
dx 1 ln 5x C x 1 1.1 ln 5 .1 1 . C.
2
A.
1 .f x x x D.
2
f x xf x 5f x x 5 x B.
2
x x x 2
A.2
2
x x x