Toán Lớp 9: $\sqrt{\frac{-2}{x -1} }$ xác định khi
A x>1
B x $\geq$ 1
C x<1
D x $\neq$ 0
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Toán Lớp 9: $\sqrt{\frac{-2}{x -1} }$ xác định khi
A x>1
B x $\geq$ 1
C x<1
D x $\neq$ 0
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