12 1EX C2 B.EX21C C. 2EX21C D.X E2 X21C...

Câu 21:

1

2

1

e

x

^



C

2

B.

e

^x

²

^

¹



C

C.

2

e

^x

²

^

¹



C

D.

x e

²

^x

²

^

¹



C

A.

sin . osxdx

5

x c



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