问题描述：
pre calculus 11的一道题
What is the value of S9 for the series 8-24+72-216+…?
a 39366 b -13122 c 52491 d 39368
What is the value of S9 for the series 8-24+72-216+…?
a 39366 b -13122 c 52491 d 39368
问题解答：
我来补答展开全文阅读