七年级数学题(平方差公式那一章)2*(3+1)(3的平方)(3的四次方+1).(3的2N次方+1)2*(3+1)(3的平方+1)(3的四次方+1)........(3的2N次方+1)
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![七年级数学题(平方差公式那一章)2*(3+1)(3的平方)(3的四次方+1).(3的2N次方+1)2*(3+1)(3的平方+1)(3的四次方+1)........(3的2N次方+1)](/uploads/image/z/1782094-22-4.jpg?t=%E4%B8%83%E5%B9%B4%E7%BA%A7%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E5%B9%B3%E6%96%B9%E5%B7%AE%E5%85%AC%E5%BC%8F%E9%82%A3%E4%B8%80%E7%AB%A0%EF%BC%892%2A%283%2B1%29%283%E7%9A%84%E5%B9%B3%E6%96%B9%29%283%E7%9A%84%E5%9B%9B%E6%AC%A1%E6%96%B9%2B1%29.%283%E7%9A%842N%E6%AC%A1%E6%96%B9%2B1%292%2A%283%2B1%29%283%E7%9A%84%E5%B9%B3%E6%96%B9%2B1%29%283%E7%9A%84%E5%9B%9B%E6%AC%A1%E6%96%B9%2B1%29........%283%E7%9A%842N%E6%AC%A1%E6%96%B9%2B1%29)
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