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[函数] 求函数y=sinx+(1/2)sin2x+(1/3)sin3x+…+(1/n)sinnx的最大值

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其妙 posted 2024-5-28 21:52 |Read mode
求函数$y=\sin x+\dfrac{\sin2x}2+\dfrac{\sin3x}3+…+\dfrac{\sin nx}n$的最大值。
这个函数有啥背景?
妙不可言,不明其妙,不着一字,各释其妙!

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战巡 posted 2024-5-29 00:47
你求个导就知道了

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1+1=? posted 2024-5-30 13:29
k 1.png 求此极限即可
1+1=2吗?

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1+1=? posted 2024-5-30 13:30
小于2
1+1=2吗?

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original poster 其妙 posted 2024-5-31 18:07
极限是多少
妙不可言,不明其妙,不着一字,各释其妙!

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original poster 其妙 posted 2024-5-31 18:11
怎么证明小于2
妙不可言,不明其妙,不着一字,各释其妙!

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original poster 其妙 posted 2024-5-31 18:12
战巡 发表于 2024-5-29 00:47
你求个导就知道了
极值点不好判断极大值和最大值
妙不可言,不明其妙,不着一字,各释其妙!

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