(1,5Đ) TÌM X.) 2 1 3A X  B) 4X 3 2  X X X 4  .   X 2 X 2...

Câu 3: (1,5đ) Tìm x.

) 2

1

3

a

x

b

) 4

x

 

3 2

x

x

x 4

.

x

2

x

2

4x