問題詳情
2. 設 x ＞ 0， y ＞ 0，且2x+3y=18
，求(1) xy之最大值為 。
，求(1) xy之最大值為 。
參考答案
答案：B
難度：困難0.365591
統計：A(11),B(34),C(13),D(16),E(0)
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