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21. 已知實數 x, y,z 滿足 ,試問 x + 2y + 3z 的最大值為多少?(A) (B) (C) (D) 。
問題詳情
21. 已知實數 x, y,z 滿足
,試問 x + 2y + 3z 的最大值為多少?
(A)
(B)
(C)
(D)
。
參考答案
答案:B
難度:適中0.625
統計:A(2),B(5),C(0),D(0),E(0)
上一篇 :
8. Ben lives near the MRT station, so he ______ to the noise of the trains.(A) used (B) is used (C)
下一篇 :
11. 已知某元素 M 於質譜中測得 之 M 2+ 值為 4.825×10 3 庫侖/克,求該元素的原子量為若干?(A)20 (B)40 (C)60 (D)80(E)100。
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