( x+3 over 3x -5 ) +1 = 3(x-2) over x-1
更新1:
答案 : 7/5 or 4 .. 請說明!!
Maths .... please
回答 (1)
2007-02-13 7:02 am
✔ 最佳答案
( x+3 over 3x -5 ) +1 = 3(x-2) over x-1x+3 + 3x-5 over 3X-5 = 3x-6 over x-1
(4x-2 ) x-1 = (3x-6 )3x-5
4x*2 -6x +2 = 9x*2 -33x +30
5x*2 -27x +28=0
(5x+7)(x+4) = 0
x=7/5 or 4
2007-02-12 23:05:23 補充：
(x+3 + 3x-5 )over 3X-5 = 3x-6 over x-13x-5 over 3X-5=1,所以( x+3 over 3x -5 ) +1=(x+3 + 3x-5) over 3X-5 (4x-2 ) (x-1) = (3x-6 )(3x-5)
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