平面上有N条直线两两相交,无三线共点,无两线平行,求这些直线将平面分成多少区域.
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![平面上有N条直线两两相交,无三线共点,无两线平行,求这些直线将平面分成多少区域.](/uploads/image/z/5911618-58-8.jpg?t=%E5%B9%B3%E9%9D%A2%E4%B8%8A%E6%9C%89N%E6%9D%A1%E7%9B%B4%E7%BA%BF%E4%B8%A4%E4%B8%A4%E7%9B%B8%E4%BA%A4%2C%E6%97%A0%E4%B8%89%E7%BA%BF%E5%85%B1%E7%82%B9%2C%E6%97%A0%E4%B8%A4%E7%BA%BF%E5%B9%B3%E8%A1%8C%2C%E6%B1%82%E8%BF%99%E4%BA%9B%E7%9B%B4%E7%BA%BF%E5%B0%86%E5%B9%B3%E9%9D%A2%E5%88%86%E6%88%90%E5%A4%9A%E5%B0%91%E5%8C%BA%E5%9F%9F.)
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