1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)化简怎么算?
1个回答
原式等于1/x-1/(x+3)
首先1/X(1+X)=1/X-1/1+X(可以通分验证)
之后每一项都这样打开 如1/(x+1)(x+2)=1/(x+1)-1/(x+2)
中间的全部消掉..得到答案
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