A) 231X4 1X4 C B) 161X4 1X4 C33X C2X C42 1 4X 1X ...

Câu 220.

a)

²

₃

¹

^

^x

⁴

¹

^

^x

⁴

^

^C

b)

¹

₆

¹

^

^x

⁴

¹

^

^x

⁴

^

^C

3

x

C

2

4

2 1

4

x



1



d)



c)

a

x

x

a

2

2





1

2

ln 3

dx

a



 

x

