abc三个数成等差数列,其中a=5+2根号6,c=5-2根号6,b=?
abc三个数成等差数列,其中a=5+2根号6,c=5-2根号6,b=?
数学人气：449 ℃时间：2019-11-07 07:24:37
优质解答
b=(a+c)/2=5
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