英文函数题目A vendor can sell 500 souvenirs per day at a price of
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英文函数题目
A vendor can sell 500 souvenirs per day at a price of $3.00 each.Each increase of 30¢ in price decreases the number of sales by 25 per day.Souvenirs cost the vendor $1.60 each.What price should be charged to maximize profit?
A vendor can sell 500 souvenirs per day at a price of $3.00 each.Each increase of 30¢ in price decreases the number of sales by 25 per day.Souvenirs cost the vendor $1.60 each.What price should be charged to maximize profit?
大致翻译一下:如果3美元一个,则一天可以卖500个.但如果每涨价30美分(0.3美元),则销量会减少25个/天.成本是1.6美元/个(肯定不能赔本卖啦XD),那么定什么价可以达到利润最大?
这样还不会做么=0=bb
设涨价幅度变量x,总销售额为y,那么利润=y-1.6(500-25x)
(3+0.3x)(500-25x)=y
自个儿做吧XD
嘿嘿,谢谢楼下的,我是没高兴把两个式子合一了
用二元函数图来看最顶点的值与范围判断就可以解出来了
这样还不会做么=0=bb
设涨价幅度变量x,总销售额为y,那么利润=y-1.6(500-25x)
(3+0.3x)(500-25x)=y
自个儿做吧XD
嘿嘿,谢谢楼下的,我是没高兴把两个式子合一了
用二元函数图来看最顶点的值与范围判断就可以解出来了
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