关于平行向量的基本定理定理说,如果a=入b,则a‖b(a b都指向量a b )那么如果我假设a=2b且a与b的向量基线相交的话那么定理还成立么?还有一个问题在平行四边形ABCD中,点m时AB的中点,点N在BD上,
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![关于平行向量的基本定理定理说,如果a=入b,则a‖b(a b都指向量a b )那么如果我假设a=2b且a与b的向量基线相交的话那么定理还成立么?还有一个问题在平行四边形ABCD中,点m时AB的中点,点N在BD上,](/uploads/image/z/6839453-29-3.jpg?t=%E5%85%B3%E4%BA%8E%E5%B9%B3%E8%A1%8C%E5%90%91%E9%87%8F%E7%9A%84%E5%9F%BA%E6%9C%AC%E5%AE%9A%E7%90%86%E5%AE%9A%E7%90%86%E8%AF%B4%2C%E5%A6%82%E6%9E%9Ca%3D%E5%85%A5b%2C%E5%88%99a%E2%80%96b%EF%BC%88a+b%E9%83%BD%E6%8C%87%E5%90%91%E9%87%8Fa+b+%EF%BC%89%E9%82%A3%E4%B9%88%E5%A6%82%E6%9E%9C%E6%88%91%E5%81%87%E8%AE%BEa%3D2b%E4%B8%94a%E4%B8%8Eb%E7%9A%84%E5%90%91%E9%87%8F%E5%9F%BA%E7%BA%BF%E7%9B%B8%E4%BA%A4%E7%9A%84%E8%AF%9D%E9%82%A3%E4%B9%88%E5%AE%9A%E7%90%86%E8%BF%98%E6%88%90%E7%AB%8B%E4%B9%88%3F%E8%BF%98%E6%9C%89%E4%B8%80%E4%B8%AA%E9%97%AE%E9%A2%98%E5%9C%A8%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%AD%2C%E7%82%B9m%E6%97%B6AB%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E7%82%B9N%E5%9C%A8BD%E4%B8%8A%2C)
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