[1-x+(x-1/x)]÷[1-(1/x+1)]

问题描述:

[1-x+(x-1/x)]÷[1-(1/x+1)]

先化简去掉中括号:(1-x+x-1/x)÷(1-1/x-1)
再化简:(1-1/x)÷(-1/x)
=(1-1/x)x(-x)
=1-x