化简代数式:(1/x-1 - 1/x+1)÷ x/x^2-1
问题描述:
化简代数式:(1/x-1 - 1/x+1)÷ x/x^2-1
答
[1/(x-1 - 1/(x+1)]÷ x/(x^2-1)
=[(x+1)-(x-1)]/(x+1)(x-1)*[(x+1)(x-1)/x]
=[2/(x+1)(x-1)]*[(x+1)(x-1)/x]
=2/xx的平方-1可以化简成什么?(x+1)(x-1)喔喔!谢谢哈~