3 years ago

Which expression could be used to find the sum of the first n terms of the geometric sequence that begins 11,22,44,…?

1 answer:

5 0

= 11( - 1)
Step-by-step explanation:
The sum to n terms of a geometric sequence is
=
where a₁ is the first term and r the common ratio
Here a₁ = 11 and r = = = 2 , then
= = 11 ( - 1)

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