在一次生意過程中,顧客購買第一件衣服是x美元,此后顧客每增加一件都比第一件少z美元.例如:第二件衣服的價格是x-z美元.以下哪一個表示的是顧客購買n件衣服需要支付的金額?
答案:x+(n-1)*(x-z)
英語翻譯
英語翻譯
During a sale,a customer can buy one shirt for x dollars.Each additional shirt the coustomer buys costs z dollars less than the first shirt,.For example,the cost of the second shirt is x-z dollars.Which of the following represents the coustomer's cost,in dollars,for n shirts bought during this sales?
During a sale,a customer can buy one shirt for x dollars.Each additional shirt the coustomer buys costs z dollars less than the first shirt,.For example,the cost of the second shirt is x-z dollars.Which of the following represents the coustomer's cost,in dollars,for n shirts bought during this sales?
其他人氣:697 ℃時間:2020-06-03 05:21:03
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