高数问题~帮我解答下~~又加了两题~

LATER

回复 10# 南湘楚


    答案对了哦~能不能帮我解多一题~题目在5楼~谢谢

为什么你梅川d酷

回复  南湘楚


    答案对了哦~能不能帮我解多一题~题目在5楼~谢谢
LATER 发表于 2012-3-22 06:04 PM

    用n=1 就找到答案了

LATER

回复 10# 南湘楚


    还有这两题怎么做~
   1）given that 3,m,n,192 are the first four consecutive terms of a geometric progression.find the three consecutive terms which added up to 16128～～
   2）the price of a new car is RM80000.It is given that the price of the car depreciates at a constant rate of 5% yearly.Calculate the minimum number of years required for      the price of the car to drop to less than RM45000.