limx→1（a/1-x²）+（x/x-1）＝3/2，a＝

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解悉数乎：

望睁悉毕册采纳

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lim [1/(1-x) -3/(1-x3)] x→1 =lim [(1+x+x2)/烂枣庆(1-x)(1+x+x2) - 3/岩碧(1-x)(1+x+x2)] x→1 =lim (1+x+x2-3)/[(1-x)(1+x+x2)] x→1 =lim (x2+x-2)/[(1-x)(1+x+x2)] x→1 =lim (x-1)(x+2)/[(1-x)(1+x+x2)] x→1 =lim -(x+2)/(1+x+x2) x→1 =-(1+2)/(1+1+12) =-3/饥握3 =-1

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