(1/2x+2)-(x/x^2-1)+(1/x-1)分式加减
题目
(1/2x+2)-(x/x^2-1)+(1/x-1)分式加减
答案
(1/2x+2)-(x/x^2-1)+(1/x-1)
=1/2(x+1)- x/(x+1)(x-1)+1/(x-1)
=1/2(x+1)- x/(x+1)(x-1)+1/(x-1)
=(x-1-2x+2x+2)/2(x+1)(x-1)
=(x+1)/2(x+1)(x-1)
=1/2(x-1)
=1/(2x-2)
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