CHO 1 ( * )3 3+ + +X 2 X 1 = − + ∈0A. A 2B 7. + = B. A 2B 5. + = C...

Câu 43: Cho 1 ( * )

3 3

+ + +

x 2 x 1 = − + ∈

0

A. a 2b 7. + = B. a 2b 5. + = C. a 2b + = − 1. D. a 2b 8. + =