有规律的一列数:2,4,6,8,10,12...它的每一项可以用2N(N是正整数)来表示,另外有规律的一列是:1,-2,3,-4,5,-6,7,-8,...(1)它的每一项你认为可用怎样的式子来表示?(2)它的第一百个数是多少?(3)-2010是不是
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![有规律的一列数:2,4,6,8,10,12...它的每一项可以用2N(N是正整数)来表示,另外有规律的一列是:1,-2,3,-4,5,-6,7,-8,...(1)它的每一项你认为可用怎样的式子来表示?(2)它的第一百个数是多少?(3)-2010是不是](/uploads/image/z/823444-52-4.jpg?t=%E6%9C%89%E8%A7%84%E5%BE%8B%E7%9A%84%E4%B8%80%E5%88%97%E6%95%B0%3A2%2C4%2C6%2C8%2C10%2C12...%E5%AE%83%E7%9A%84%E6%AF%8F%E4%B8%80%E9%A1%B9%E5%8F%AF%E4%BB%A5%E7%94%A82N%28N%E6%98%AF%E6%AD%A3%E6%95%B4%E6%95%B0%29%E6%9D%A5%E8%A1%A8%E7%A4%BA%2C%E5%8F%A6%E5%A4%96%E6%9C%89%E8%A7%84%E5%BE%8B%E7%9A%84%E4%B8%80%E5%88%97%E6%98%AF%3A1%2C-2%2C3%2C-4%2C5%2C-6%2C7%2C-8%2C...%281%29%E5%AE%83%E7%9A%84%E6%AF%8F%E4%B8%80%E9%A1%B9%E4%BD%A0%E8%AE%A4%E4%B8%BA%E5%8F%AF%E7%94%A8%E6%80%8E%E6%A0%B7%E7%9A%84%E5%BC%8F%E5%AD%90%E6%9D%A5%E8%A1%A8%E7%A4%BA%3F%282%29%E5%AE%83%E7%9A%84%E7%AC%AC%E4%B8%80%E7%99%BE%E4%B8%AA%E6%95%B0%E6%98%AF%E5%A4%9A%E5%B0%91%3F%283%29-2010%E6%98%AF%E4%B8%8D%E6%98%AF)
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