Asked by Neil
20
(Sigma Sign) 2n + 7
k= 1
(Sigma Sign) 2n + 7
k= 1
Answers
Answered by
MathMate
∑2n+7
=2∑n + ∑ 7
=2*(20+1)(20/2) + 20*7
=420+140
=560
=2∑n + ∑ 7
=2*(20+1)(20/2) + 20*7
=420+140
=560
Answered by
Neil
Thank you, MathMate.
Answered by
Neil
Wait, do you know how it could be plugged into the Sn= a1 (1 - r^n/ 1 - r) formula?
Answered by
MathMate
Sn= a1 (1 - r^n/ 1 - r)
applies when the series is a geometric progression, such as
20
∑ a1*r^i
i=1
applies when the series is a geometric progression, such as
20
∑ a1*r^i
i=1
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.