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標題:

a math question

發問:

Solve the following equality [ x/(x+3) ] is less than or equal to [ -6/(5x-25)]

最佳解答:

here is the solution: 圖片參考：http://img209.imageshack.us/img209/408/gfjjjsx8.jpg

其他解答:

 

此文章來自奇摩知識+如有不便請留言告知

Please note that the 1st answer is wrong. The 2nd one is correct.|||||[ x/(x+3) ] <= [ -6/(5x-25)] x/(x+3) <= -6/(5x-25) x(5x-25) <= -6(x+3) 5x^2 - 25x <= -6x -18 5x^2 -19x +18 <= 0 (5x - 9)(x - 2) <= 0 x <= 9/5 or 20D7DAC4E6DF60DFA
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