你好,我提问的那个lim(1/x^2sin1/x)求极限(lim下是x~0) 的题还是不大明白1/sin(1/x)的上下界是什么哪?我觉sin(1/x)属于[-1,1],但1/sin(1/x)属于负无穷到-1和1到正无穷啊?它由上下界吗?那个题是个选择
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![你好,我提问的那个lim(1/x^2sin1/x)求极限(lim下是x~0) 的题还是不大明白1/sin(1/x)的上下界是什么哪?我觉sin(1/x)属于[-1,1],但1/sin(1/x)属于负无穷到-1和1到正无穷啊?它由上下界吗?那个题是个选择](/uploads/image/z/2689109-53-9.jpg?t=%E4%BD%A0%E5%A5%BD%2C%E6%88%91%E6%8F%90%E9%97%AE%E7%9A%84%E9%82%A3%E4%B8%AAlim%281%2Fx%5E2sin1%2Fx%29%E6%B1%82%E6%9E%81%E9%99%90%EF%BC%88lim%E4%B8%8B%E6%98%AFx%7E0%29+%E7%9A%84%E9%A2%98%E8%BF%98%E6%98%AF%E4%B8%8D%E5%A4%A7%E6%98%8E%E7%99%BD1%2Fsin%281%2Fx%EF%BC%89%E7%9A%84%E4%B8%8A%E4%B8%8B%E7%95%8C%E6%98%AF%E4%BB%80%E4%B9%88%E5%93%AA%3F%E6%88%91%E8%A7%89sin%281%2Fx%EF%BC%89%E5%B1%9E%E4%BA%8E%5B-1%2C1%5D%2C%E4%BD%861%2Fsin%281%2Fx%29%E5%B1%9E%E4%BA%8E%E8%B4%9F%E6%97%A0%E7%A9%B7%E5%88%B0-1%E5%92%8C1%E5%88%B0%E6%AD%A3%E6%97%A0%E7%A9%B7%E5%95%8A%3F%E5%AE%83%E7%94%B1%E4%B8%8A%E4%B8%8B%E7%95%8C%E5%90%97%3F%E9%82%A3%E4%B8%AA%E9%A2%98%E6%98%AF%E4%B8%AA%E9%80%89%E6%8B%A9)
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