CHO 211X+ ⋅ C. (X2+1) X2+1. D. 1+X2. + ⋅ B. A. 1 221 XX...

Câu 36:

Cho

2

1

x

+

C.

(

x

2

+

1)

x

2

+

1.

D.

1

+

x

2

.

+

B.

A.

1

2

2

1

x

 −

+ −

+ −

=

a

b

c