计算:a+1+(1/a-1)
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a+1+(1/a-1)是a+1+1/(a-1)吧
解:a+1+1/(a-1)
=(a+1)(a-1)/(a-1)+1/(a-1)
=(a^2-1)/(a-1)+1/(a-1)
=a^2/(a-1)
解:a+1+1/(a-1)
=(a+1)(a-1)/(a-1)+1/(a-1)
=(a^2-1)/(a-1)+1/(a-1)
=a^2/(a-1)
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