解
平均数
=(x+2x+3x+4x+5x)/5
=1
即15x/5=1
∴15x=5
∴x=1/3
若数据 x,2x,3x,4x,5x,的平均数是1,则x?
若数据 x,2x,3x,4x,5x,的平均数是1,则x?
数学人气：262 ℃时间：2020-03-20 18:17:33
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