化简下列各式,并指出的取值范围.x/x-1-3/(x-1)(x+2)-1

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化简下列各式,并指出的取值范围.x/x-1-3/(x-1)(x+2)-1

化简下列各式,并指出的取值范围.x/x-1-3/(x-1)(x+2)-1
化简下列各式,并指出的取值范围.x/x-1-3/(x-1)(x+2)-1

化简下列各式,并指出的取值范围.x/x-1-3/(x-1)(x+2)-1
x/(x-1)-3/(x-1)(x+2)-1
=((x*(x+2)-3-(x-1)(x+2))/(x-1)(x+2)
=(x²+2x-3-x²-x+2)/(x-1)(x+2)
=(x-1)/(x-1)(x+2)
=1/(x+2)
x+2≠0
得:x≠-2
一定要选为最佳答案鼓励我一下哦.