若a=(cosa,sina),b=(cosb,sinb),且|ka+b|=√3|a-kb|,k>0 ,问a与b能否垂直若a=(cosa,sina),b=(cosb,sinb),且|ka+b|=√3|a-kb|,k>0 ,问a与b能否垂直若ab夹角为60,求k
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![若a=(cosa,sina),b=(cosb,sinb),且|ka+b|=√3|a-kb|,k>0 ,问a与b能否垂直若a=(cosa,sina),b=(cosb,sinb),且|ka+b|=√3|a-kb|,k>0 ,问a与b能否垂直若ab夹角为60,求k](/uploads/image/z/2623190-14-0.jpg?t=%E8%8B%A5a%3D%EF%BC%88cosa%2Csina%EF%BC%89%2Cb%3D%28cosb%2Csinb%29%2C%E4%B8%94%EF%BD%9Cka%2Bb%EF%BD%9C%3D%E2%88%9A3%EF%BD%9Ca-kb%EF%BD%9C%2Ck%EF%BC%9E0+%2C%E9%97%AEa%E4%B8%8Eb%E8%83%BD%E5%90%A6%E5%9E%82%E7%9B%B4%E8%8B%A5a%3D%EF%BC%88cosa%2Csina%EF%BC%89%2Cb%3D%28cosb%2Csinb%29%2C%E4%B8%94%EF%BD%9Cka%2Bb%EF%BD%9C%3D%E2%88%9A3%EF%BD%9Ca-kb%EF%BD%9C%2Ck%EF%BC%9E0+%2C%E9%97%AEa%E4%B8%8Eb%E8%83%BD%E5%90%A6%E5%9E%82%E7%9B%B4%E8%8B%A5ab%E5%A4%B9%E8%A7%92%E4%B8%BA60%2C%E6%B1%82k)
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