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是不是 n趨向於 無窮?如果是x趨向無窮,答案直接是(sin n)/n 跟x無關 如果你題目寫錯了,答案是0 lim (sin n)/n=lim (1/n)*(sin n) n→無窮 n→無窮 根據 【無窮小*有界函數=無窮小】;1/n是無窮小;sin n是有界函數
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