增加一點難度, 原題中所有平方改為4次方,求和
所有跟帖:
• 好題,利用sin2x=2sinxcosx, 應該可以湊出答案,我手邊沒有紙筆,心算得34.25, 可能不準 -monseigneur- ♂ (0 bytes) () 01/22/2022 postreply 16:19:30
• 好題,利用sin2x=2sinxcosx, 應該可以湊出答案,我手邊沒有紙筆,心算得34.25, 可能不準 -monseigneur- ♂ (0 bytes) () 01/22/2022 postreply 16:19:30
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