先化简再求值√﹙X/x³-2x²﹚÷√x-2/x-2,x=8
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 18:25:41
![先化简再求值√﹙X/x³-2x²﹚÷√x-2/x-2,x=8](/uploads/image/z/440228-20-8.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%E5%86%8D%E6%B1%82%E5%80%BC%E2%88%9A%EF%B9%99X%EF%BC%8Fx%26%23179%3B-2x%26%23178%3B%EF%B9%9A%C3%B7%E2%88%9Ax-2%EF%BC%8Fx-2%2Cx%3D8)
x){gu
OzmlzڰQǬ;gF_lhnikfXX9vtHVH&H
P5}3m
+4,Zr@9i$ف Uzh
先化简再求值√﹙X/x³-2x²﹚÷√x-2/x-2,x=8
先化简再求值√﹙X/x³-2x²﹚÷√x-2/x-2,x=8
先化简再求值√﹙X/x³-2x²﹚÷√x-2/x-2,x=8
原式
=√[1/x(x-2)]÷1/√(x-2)
=√[1/x(x-2)]*√(x-2)
=√(1/x)
=√(1/8)
=(√2)/4