x减二分之二减三x无解 求x平方减一乘以x加一分之一减x减一分之一减一的值
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亲亲,您好!很高兴为您解答。答案为:1/(x-2) + 2/(x+1) - 2/(x-1) - 1/(x+2)= [1/(x-2) - 1/(x+2)] + [2/(x+1) - 2/(x-1)]= 4/(x^2-4) - 4/(x^2-1)= 4[1/(x^2-4) - 1/(x^2-1)]= 4*3/[(x^2-4)(x^2-1)]= 12/[(x^2-4)(x^2-1)]
咨询记录 · 回答于2022-12-24
x减二分之二减三x无解 求x平方减一乘以x加一分之一减x减一分之一减一的值
亲亲,您有题目照片嘛,这样老师看的更直观给您解答的更快哈
亲亲,您好!很高兴为您解答。答案为:1/(x-2) + 2/(x+1) - 2/(x-1) - 1/(x+2)= [1/(x-2) - 1/(x+2)] + [2/(x+1) - 2/(x-1)]= 4/(x^2-4) - 4/(x^2-1)= 4[1/(x^2-4) - 1/(x^2-1)]= 4*3/[(x^2-4)(x^2-1)]= 12/[(x^2-4)(x^2-1)]