已知m=根号3,求(1-2m+m平方)/(m-1)-(m-1)/(m²-m)的值
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已知m=根号3,求(1-2m+m平方)/(m-1)-(m-1)/(m²-m)的值
已知m=根号3,求(1-2m+m平方)/(m-1)-(m-1)/(m²-m)的值
已知m=根号3,求(1-2m+m平方)/(m-1)-(m-1)/(m²-m)的值
将(1-2m+m平方)/(m-1)-(m-1)/(m²-m)化简为
= m - 1 - 1/m
再将 m = √ 3 代入,并通分相加得
= (2-√3)/√3 = (2√3) / 3 - 1
(1-2m+m²)/(m-1)-(m-1)/(m²-m)
=(m-1)²/(m-1)-(m-1)/[m(m-1)]
=(m-1)-(1/m)
=(根3-1)-(1/根3)
=(2倍根3/3)-1