化简(x-1)乘以根号下(x-1)分之负2

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化简(x-1)乘以根号下(x-1)分之负2化简(x-1)乘以根号下(x-1)分之负2化简(x-1)乘以根号下(x-1)分之负2(X-1)•√[(-2)/(X-1)]=(X-1)•

化简(x-1)乘以根号下(x-1)分之负2
化简(x-1)乘以根号下(x-1)分之负2

化简(x-1)乘以根号下(x-1)分之负2
(X-1)•√[(-2)/(X-1)]
=(X-1)•√[2/(1-X)] ----------------可知1-X>0.
=(X-1)•√[2(1-X)/(1-X)²]
=(X-1)•[√(2-2X)]/(1-X)}
= -√(2-2X).

x-1就是根号下(x-1)的平方啊结果就是-2乘以根号下(x-1)

(x-1)乘以根号下(x-1)分之负2
=-2√(x-1)