c里c里歌曲:5555555~~~,帮帮忙解解啊,我不会啊

来源：百度文库编辑：高校问答时间：2024/04/27 18:50:58

某商场在第一季度内将某种家电连续进行了两次降价,其中3月份的降价比2月份的降价要多降两个百分点(即2%),结果3月份的销售台数比1月份增加4倍,销售收入增加296%,问2月份比1月份降价百分之几?
不是帮忙翻译啊,是数学题,帮我解出来啊

hehe解出来了，要谢谢另一位网友：）！！

设1月销量为Q，3月销量为5Q.
设1月价格为P，2月比1月降价X%，即2月价格为P(1-X%)，3月价格为P(1-X%)(1-2%).
由收入=销量*单价，
5Q*P(1-X%)(1-2%)=PQ*(1+296%)

可以解得X%=94/98*5
解得X%=大概是19%

哎!我怎么做不来呢???????????唉~~~~~~~~~

A shopping mall in the first quarter will be a home for two consecutive cuts, which in March than in February cut the price to drop more than two percentage points (or 2%), resulting in sales in March than a few Taiwan in January increased by 4 times, 296% increase in sales revenue, asked in February than in January price percentage?

The some market compare a certain appliance carry on continuously to reduce price twice,3 among those monthses reduce price to compare the February to reduce price to to decline two more percentage points( namely 2%), the sale set of the March of result number January to increase in the first quarter degree 400%, sell the income to increase 296%, ask to compare February to reduce price January 100 divide it several?

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