互不相等的四个数a b c d 成等差数列,它们的和是28,a与b的等差中项为m,且m c d成等比数列,求这四个数.
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![互不相等的四个数a b c d 成等差数列,它们的和是28,a与b的等差中项为m,且m c d成等比数列,求这四个数.](/uploads/image/z/15000590-38-0.jpg?t=%E4%BA%92%E4%B8%8D%E7%9B%B8%E7%AD%89%E7%9A%84%E5%9B%9B%E4%B8%AA%E6%95%B0a+b+c+d+%E6%88%90%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%2C%E5%AE%83%E4%BB%AC%E7%9A%84%E5%92%8C%E6%98%AF28%2Ca%E4%B8%8Eb%E7%9A%84%E7%AD%89%E5%B7%AE%E4%B8%AD%E9%A1%B9%E4%B8%BAm%2C%E4%B8%94m+c+d%E6%88%90%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E6%B1%82%E8%BF%99%E5%9B%9B%E4%B8%AA%E6%95%B0.)
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