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若a,b,c成等差数列,而a+1,b,c和a,b,c+2都分别成等比数列,则b的
若a,b,c成等差数列,而a+1,b,c和a,b,c+2都分别成等比数列,则b的
发布时间:2020-07-13 17:23:24
若a,b,c成等差数列,而a+1,b,c和a,b,c+2都分别成等比数列,则b的值为A.16B.15C.14D.12
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D
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