要使x+1/2x-1的值与2x+1/4x-1的值互为倒数,则有------------------( ) A.x=0 B.x=2 C.x=1/3 D.x=-2/9
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![要使x+1/2x-1的值与2x+1/4x-1的值互为倒数,则有------------------( ) A.x=0 B.x=2 C.x=1/3 D.x=-2/9](/uploads/image/z/1636934-14-4.jpg?t=%E8%A6%81%E4%BD%BFx%2B1%2F2x-1%E7%9A%84%E5%80%BC%E4%B8%8E2x%2B1%2F4x-1%E7%9A%84%E5%80%BC%E4%BA%92%E4%B8%BA%E5%80%92%E6%95%B0%2C%E5%88%99%E6%9C%89------------------%EF%BC%88+%EF%BC%89+A.x%3D0+B.x%3D2+C.x%3D1%2F3+D.x%3D-2%2F9)
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要使x+1/2x-1的值与2x+1/4x-1的值互为倒数,则有------------------( ) A.x=0 B.x=2 C.x=1/3 D.x=-2/9
要使x+1/2x-1的值与2x+1/4x-1的值互为倒数,则有------------------( ) A.x=0 B.x=2 C.x=1/3 D.x=-2/9
要使x+1/2x-1的值与2x+1/4x-1的值互为倒数,则有------------------( ) A.x=0 B.x=2 C.x=1/3 D.x=-2/9
A
代入法最简单
-1的倒数还是-1
一个个代进去不就可以了,身上没笔不好意思,或者直接x+1/2x-1=4x-1/2x+1把x解出来,或者选项一个一个代进去看看哪个符合
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