化简x-1/x²-2x+1÷1/x²-1,其中x=根号2-1

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/01 19:53:29

化简x-1/x²-2x+1÷1/x²-1,其中x=根号2-1
化简x-1/x²-2x+1÷1/x²-1,其中x=根号2-1

化简x-1/x²-2x+1÷1/x²-1,其中x=根号2-1
x-1/x²-2x+1÷1/x²-1
=(x-1)/(x-1)^2*(x+1)(x-1)
=x+1
=根号2-11
=根号2

(x-1)/(x²-2x+1)÷1/(x²-1)
=(x-1)/(x-1)²÷1/(x²-1)
=1/(x-1)÷1/(x²-1)
=(x²-1)/(x-1)
=x+1
代入√2-1
=√2