问题描述：
一道很简单的sat数学题!
The first term in the sequence above us a,and each term after the first is 3 times the preceeding term.If the sum of the first 5 terms is 605,what is the value of
The first term in the sequence above us a,and each term after the first is 3 times the preceeding term.If the sum of the first 5 terms is 605,what is the value of
问题解答：
我来补答展开全文阅读