化简：（1）x+1分之x+2-x+1分之x-1 (2)x-1分之1-x²-1分之x_数学解答

化简：（1）x+1分之x+2-x+1分之x-1 (2)x-1分之1-x²-1分之x

人气：230 ℃　时间：2020-03-29 08:37:33

解答

1、=[(x+2)-(x-1)]/(x+1)
=(x+2-x+1)/(x+1)
=3/(x+1)
2、=(x+1)/(x+1)(x-1)-x/(x+1)(x-1)
=(x+1-x)/(x+1)(x-1)
=1/(x²-1)