Ask your own question, for FREE!
Mathematics 97 Online
OpenStudy (anonymous):

What is the sum of the geometric sequence 8, –16, 32 … if there are 15 terms?

OpenStudy (anonymous):

a =8, r = -2, n = 15 Sn = a(1-r^n)/(1-r) Sn = 8( 1- (-2)^15) /(1-(-2) Sn = 8/3* (1 - -32768) Sn = 8/3 8 (32769) Sn = 8* 32769/3 =8 *10923 =87,384

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
notmeta: help
1 hour ago 4 Replies 0 Medals
toga: why are you not supposed to pop pimples
1 hour ago 11 Replies 1 Medal
zombieblud: Help
2 hours ago 4 Replies 2 Medals
KarmaXD: How do u tell your crush u like him/her???
58 minutes ago 2 Replies 0 Medals
PureSoulless: (Genuine question.) Is being a femboy gay?
10 hours ago 0 Replies 0 Medals
Abby13915: A drawing I did March-
1 hour ago 8 Replies 2 Medals
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!