Question

Explain how to write the series 2 + 12 +72 + 432 + 2592 using sigma notation.

Answer 1

We need to find the sum of n terms right!
So find the nth term first = ar^(n-1) = 2*6^(5-1)
2*6^4

So n varies from 1 to 5

So in sigma notation it'll be

\[\sum_{1}^{5} 2*6^(n-1)\]

Answer 2

Becuase it is a geometric progression! :)

Answer 3

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Answer 4

Thank you @AkashdeepDeb !

Answer 5

I've been stuck on this for awhile, haha.

Answer 6

:)