Toán Lớp 8: $\frac{2(x-1)}{x^2}$ . $\frac{x}{x-1}$
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Toán Lớp 8: $\frac{2(x-1)}{x^2}$ . $\frac{x}{x-1}$
Comments ( 2 )
\frac{2(x – 1)}{x^2} . \frac{x}{x – 1} ( với x \ne 0 ; 1 )
= \frac{2(x – 1) . x}{x^2 . (x – 1)}
= \frac{2}{x}
Giải đáp : 2/x
\frac{ 2 ( x -1 )}{x^2} . \frac{ x}{ x – 1 } ( x \ne 0 ; x \ne 1 )
= \frac{ 2 ( x – 1 ) . x }{ x^2 . ( x – 1 )}
= \frac{2}{x}