Mathematics
Mathematics, 09.08.2021 06:20, schoolboyq3017

Câu 4. Cho hàm số   2 cos sin 4 4 f x m x x   . Tìm m để cho 0
4
       f  .

A. m  2 . B. m  2 2 . C. m  2 . D. m  2 .

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Câu 4. Cho hàm số   2 cos sin 4 4 f x m x x   . Tìm m để cho 0
4
       f ...

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