Question

（8分）某手機(jī)專營店代理銷售A、B兩種型號手機(jī)．手機(jī)的進(jìn)價(jià)、售價(jià)如下

表：

（1）第一季度：用36000元購進(jìn) A、B兩種型號的手機(jī)，全部售完后獲利6300元，求

第一季度購進(jìn)A、B兩種型號手機(jī)的數(shù)量；

（2）第二季度：計(jì)劃購進(jìn)A、B兩種型號手機(jī)共34部，且不超出第一季度的購機(jī)總費(fèi)用，則A型號手機(jī)最多能購多少部？

 

Answer 1

（1）解：設(shè)該專營店第一季度購進(jìn)A、B兩種型號手機(jī)的數(shù)量分別為x部和y部．····· 1分

答：該專營店本次購進(jìn)A、B兩種型號手機(jī)的數(shù)分別為15部和18部．······························································ 4分

（2）解：設(shè)第二季度購進(jìn)A型號手機(jī)a部．···················································· 5分

由題意可知：1200a+1000(34－a)≤36000，····················································· 6分

解得：a≤10··························································································· 7分

不等式的最大整數(shù)解為10

答：第二季度最多能購A型號手機(jī)10部．······················································ 8分

解析:略