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请直接用(2)中的规律计算:1/(x-2)(x-3)-1/(x-1)(x-3)+1/(x-1)(x-2)的结果

题目详情
请直接用(2)中的规律计算:1/(x-2)(x-3)-1/(x-1)(x-3)+1/(x-1)(x-2)的结果
▼优质解答
答案和解析
1/(x-2)(x-3)-1/(x-1)(x-3)+1/(x-1)(x-2)
=1/(x-3)-1/(x-2)-½[1/(x-3)-1/(x-1)]+1/(x-2)-1/(x-1)
=½×1/(x-3)-½×1/﹙x-1)
=½×2×1/(x-1)(x-3)
=1/(x-1)(x-3)