题目
题型:不详难度:来源:
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A.必要而不充分条件 | B.充分而不必要条件 | C.充分而且必要条件 | D.既不充分又不必要条件 |
答案
解析
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核心考点
试题【已知、为非零的不共线的向量,设条件;条件对一切,不等式恒成立.则是的( )A.必要而不充分条件B.充分而不必要条件C.充分而且必要条件D.既不充分又不必要条件】;主要考察你对平面向量数量积的意义等知识点的理解。[详细]
举一反三
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(1)若
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(2)若
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