推 linchijen:3/4 06/02 22:13
→ code2657:對耶 感謝解答 06/04 09:31
我想請問這題
If x is positive, which of the following could be the correct ordering of
1/x ,2x, and x^2 ?
I. x^2< 2x< 1/x
II x^2 < 1/x< 2X
III 2x < x^2< 1/x
(A) None
(B) I only
(C) III only
(D) I and II only
(E) I, II, and III
I 用 1/2代成立
那II 呢？
大家可以幫我解答一下嗎
謝謝
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