化简：[1/(x-2)]- [2/(x的平方-4) ]÷[x/(x+2)],
问题描述：
化简：[1/(x-2)]- [2/(x的平方-4) ]÷[x/(x+2)],
答
[1/(x-2)]-[2/(x^2-4)]/[x/(x+2)]
=[1/(x-2)]-2/[(x-2)x]
=(x-2)/[(x-2)x]
=1/x
疏璃妹子啊.乃还没睡啊..这都几点了、