Question

先化简,再求值:(x^3-x)/(x^2-2x+1)×(1-1/x),其中x=√2-1

急啊

Answer 1

原式=X(X-1)(X+1)/[(X-1)^2]*(X-1)/X=X+1
带入x值
原式=根号2

Answer 2

原式=X(X-1)(X+1)/[(X-1)^2]*(X-1)/X=X+1
带入x值
原式=根号2

Answer 3

sorry I don't know