设A为X 则B为3X C为9X
又2*(B+8)=A+C
也就是2*(3X+8)=X+9X
就是6X+16=10X
就是4X=16
也就是X=4
所以A=4 B=12 C=36
若三数a,b,c成等比数列,且公比q=3,又a,b+8,c成等差数列,求这三个数
若三数a,b,c成等比数列,且公比q=3,又a,b+8,c成等差数列,求这三个数
数学人气:129 ℃时间:2020-05-20 19:40:53
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