注 *代表乘号1/1*3+1/2*4+1/3*5+.+1/99*101口头叙述;1+1/3+1/3的2次方+1/3的3次方+.1/3的100次方用简便方法计算
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![注 *代表乘号1/1*3+1/2*4+1/3*5+.+1/99*101口头叙述;1+1/3+1/3的2次方+1/3的3次方+.1/3的100次方用简便方法计算](/uploads/image/z/3871062-54-2.jpg?t=%E6%B3%A8+%2A%E4%BB%A3%E8%A1%A8%E4%B9%98%E5%8F%B71%2F1%2A3%2B1%2F2%2A4%2B1%2F3%2A5%2B.%2B1%2F99%2A101%E5%8F%A3%E5%A4%B4%E5%8F%99%E8%BF%B0%EF%BC%9B1%2B1%2F3%2B1%2F3%E7%9A%842%E6%AC%A1%E6%96%B9%2B1%2F3%E7%9A%843%E6%AC%A1%E6%96%B9%2B.1%2F3%E7%9A%84100%E6%AC%A1%E6%96%B9%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97)
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