2 2
2a — 4ab + 5b = 24
2 2
(c—6) + (d—3) = 1 滿足左列 2 個方程式 , 求 ac + bd 的最大值 ?
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02/23 14:28, , 1F
02/23 14:28, 1F
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02/23 14:29, , 2F
02/23 14:29, 2F
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02/23 15:25, , 3F
02/23 15:25, 3F
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02/23 17:22, , 4F
02/23 17:22, 4F
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02/23 21:53, , 5F
02/23 21:53, 5F
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