(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
) 2
1
3
a
x
b
) 4
x
3 2
x
x
x 4
.
x
2
x
2
4x