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  • 更新 2022-09-03
  • 科目 数学
  • 题型 选择题
  • 难度 容易
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已知,点C在内, ,若=2m+m),则=(    )                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

A.1 B.2 C. D.4
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已知,,,点C在内,,若2mm(),则()A.1B.2C.D