1(2X+根号下X)的4次方的展开式中各项系数和为?2 正方体ABCD-A1B1C1D1的棱长为1,这点A1到平面ABC1D1的距离为(A1B1……的1为脚码,但我打不出那种形式)3 正三菱锥的高为根号3,侧棱长为根号7,那
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![1(2X+根号下X)的4次方的展开式中各项系数和为?2 正方体ABCD-A1B1C1D1的棱长为1,这点A1到平面ABC1D1的距离为(A1B1……的1为脚码,但我打不出那种形式)3 正三菱锥的高为根号3,侧棱长为根号7,那](/uploads/image/z/3921407-71-7.jpg?t=1%EF%BC%882X%2B%E6%A0%B9%E5%8F%B7%E4%B8%8BX%EF%BC%89%E7%9A%844%E6%AC%A1%E6%96%B9%E7%9A%84%E5%B1%95%E5%BC%80%E5%BC%8F%E4%B8%AD%E5%90%84%E9%A1%B9%E7%B3%BB%E6%95%B0%E5%92%8C%E4%B8%BA%3F2+%E6%AD%A3%E6%96%B9%E4%BD%93ABCD-A1B1C1D1%E7%9A%84%E6%A3%B1%E9%95%BF%E4%B8%BA1%2C%E8%BF%99%E7%82%B9A1%E5%88%B0%E5%B9%B3%E9%9D%A2ABC1D1%E7%9A%84%E8%B7%9D%E7%A6%BB%E4%B8%BA%EF%BC%88A1B1%E2%80%A6%E2%80%A6%E7%9A%841%E4%B8%BA%E8%84%9A%E7%A0%81%2C%E4%BD%86%E6%88%91%E6%89%93%E4%B8%8D%E5%87%BA%E9%82%A3%E7%A7%8D%E5%BD%A2%E5%BC%8F%EF%BC%893+%E6%AD%A3%E4%B8%89%E8%8F%B1%E9%94%A5%E7%9A%84%E9%AB%98%E4%B8%BA%E6%A0%B9%E5%8F%B73%2C%E4%BE%A7%E6%A3%B1%E9%95%BF%E4%B8%BA%E6%A0%B9%E5%8F%B77%2C%E9%82%A3)
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