Give a ,b ,c satisfy c＜b＜a and ac＜0 ,then which one is not sure to be correct in the following
inequalities?
A a分之b ＞a分之c
B c分之（b-a)＞0
C c分之(b²）＞c分之a²
D ac分之（a-c)＜0
人气：231 ℃ 时间：2020-04-29 12:32:37
解答
choose C,for example,c = -2,b = -1,a=1,obviously,b²/c = a²/c
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