A. 2≠X B. 2≤ <X 5. C. X3−4X= ⇔ =0 X 0;X=2;X= −2.  ≥D.X3− 4X...

5 . - KIEM TRA TRAC NGHIEM HK1 TOAN 10
KIEM TRA TRAC NGHIEM HK1 TOAN 10

5 .

A.

2

≠

xB. 2≤ <x 5. C. x

3

−4x= ⇔ =0 x 0;x=2;x= −2.  ≥D.x

3

− 4

x

= ⇔ = 0

x

0

hoặc x

2

− = 4 0.

2 ≠