CHO I X F X G X DX3 ( ) 2 ( )G X DXF X DX( ) 1( ) 2111A....

Câu 21. Cho

I x f x g x dx

3 ( ) 2 ( )

g x dx

f x dx

( ) 1

( ) 2

1

A. 5 .

I  2 B . 19 .

I  2 C . 17 .

I  2 D . 7 .

I  2