设三四月份的平均增长率为x
而,二月份的产值为：50*（1+20%）=60
故,60*（1+x)^2=101.4
故,x=30%
某工厂1月份产值为50万元,采用先进技术后,2月份产值比一月份增长20%,4月份产值为101.4万元
某工厂1月份产值为50万元,采用先进技术后,2月份产值比一月份增长20%,4月份产值为101.4万元
问三四月份平均增长率!
问三四月份平均增长率!
数学人气：643 ℃时间：2020-02-02 13:35:09
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