下图是有长度相等的火柴棒搭成的图形,一个小正方形需要4根,问第N个图形需要几根火柴棒?1:田2:田田(俩个紧挨着)3:田田田(三个紧挨着)
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![下图是有长度相等的火柴棒搭成的图形,一个小正方形需要4根,问第N个图形需要几根火柴棒?1:田2:田田(俩个紧挨着)3:田田田(三个紧挨着)](/uploads/image/z/5207111-71-1.jpg?t=%E4%B8%8B%E5%9B%BE%E6%98%AF%E6%9C%89%E9%95%BF%E5%BA%A6%E7%9B%B8%E7%AD%89%E7%9A%84%E7%81%AB%E6%9F%B4%E6%A3%92%E6%90%AD%E6%88%90%E7%9A%84%E5%9B%BE%E5%BD%A2%2C%E4%B8%80%E4%B8%AA%E5%B0%8F%E6%AD%A3%E6%96%B9%E5%BD%A2%E9%9C%80%E8%A6%814%E6%A0%B9%2C%E9%97%AE%E7%AC%ACN%E4%B8%AA%E5%9B%BE%E5%BD%A2%E9%9C%80%E8%A6%81%E5%87%A0%E6%A0%B9%E7%81%AB%E6%9F%B4%E6%A3%92%3F1%EF%BC%9A%E7%94%B02%EF%BC%9A%E7%94%B0%E7%94%B0%EF%BC%88%E4%BF%A9%E4%B8%AA%E7%B4%A7%E6%8C%A8%E7%9D%80%EF%BC%893%EF%BC%9A%E7%94%B0%E7%94%B0%E7%94%B0%EF%BC%88%E4%B8%89%E4%B8%AA%E7%B4%A7%E6%8C%A8%E7%9D%80%EF%BC%89)
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