問題詳情
26. The maximum value of the function f (x, y, z) = x + 2y + 3z subject to the constraint x2 + y2 + z2 = 25 is _______.
(A) 7√14
(B)
(C) 5√14
(D) 15
(E)
(A) 7√14
(B)
(C) 5√14
(D) 15
(E)
參考答案
無參考答案
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