已知实数m.n满足:m/(x-1)+n/(x+2)=(2x+7)/(x-1)(x+1) 求m和n的值

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已知实数m.n满足:m/(x-1)+n/(x+2)=(2x+7)/(x-1)(x+1) 求m和n的值
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已知实数m.n满足:m/(x-1)+n/(x+2)=(2x+7)/(x-1)(x+1) 求m和n的值
已知实数m.n满足:m/(x-1)+n/(x+2)=(2x+7)/(x-1)(x+1) 求m和n的值

已知实数m.n满足:m/(x-1)+n/(x+2)=(2x+7)/(x-1)(x+1) 求m和n的值
m/(x-1)+n/(x+2)=(2x+7)/(x-1)(x+1)
m(x+2)+n(x-1)=2x+7
(m+n)x+2m-n=2x+7
比较系数得
m+n=2
2m-n=7
解得m=3,n=-1

m/(x-1)+n/(x+2)=(2x+7)/(x-1)(x+2)
m(x+2)+n(x-1)=2x+7
(m+n)x+2m-n=2x+7
所以:
m+n=2
2m-n=7
解得m=3,n=-1

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