1、已知a=(x,4),b=(3,2),a‖b,求x2、已知向量AB=(6,1),向量BC=(x,y),向量CD=(-2,-3),求向量AD的值3、已知向量a与b共线,且a=(2,-3),b=(4x,x平方-5x),求x
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![1、已知a=(x,4),b=(3,2),a‖b,求x2、已知向量AB=(6,1),向量BC=(x,y),向量CD=(-2,-3),求向量AD的值3、已知向量a与b共线,且a=(2,-3),b=(4x,x平方-5x),求x](/uploads/image/z/8543015-71-5.jpg?t=1%E3%80%81%E5%B7%B2%E7%9F%A5a%3D%28x%2C4%29%2Cb%3D%283%2C2%29%2Ca%E2%80%96b%2C%E6%B1%82x2%E3%80%81%E5%B7%B2%E7%9F%A5%E5%90%91%E9%87%8FAB%3D%EF%BC%886%2C1%EF%BC%89%2C%E5%90%91%E9%87%8FBC%3D%28x%2Cy%29%2C%E5%90%91%E9%87%8FCD%3D%28-2%2C-3%29%2C%E6%B1%82%E5%90%91%E9%87%8FAD%E7%9A%84%E5%80%BC3%E3%80%81%E5%B7%B2%E7%9F%A5%E5%90%91%E9%87%8Fa%E4%B8%8Eb%E5%85%B1%E7%BA%BF%2C%E4%B8%94a%3D%282%2C-3%29%2Cb%3D%284x%2Cx%E5%B9%B3%E6%96%B9-5x%29%2C%E6%B1%82x)
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