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Lady_Fox [76]
3 years ago
15

The sum of the first 8 terms of a geometric sequence with 4 as the first term and a common ratio of 3 is ​

Mathematics
2 answers:
ki77a [65]3 years ago
7 0

9514 1404 393

Answer:

  13120

Step-by-step explanation:

The sum of terms of a geometric series is ...

  Sn = a1·(r^n -1)/(r -1)

You have n=8, a1=4, r=3, so the sum is ...

  S8 = 4·(3^8 -1)/(3 -1) = 2(3^8 -1) = 13,120

olya-2409 [2.1K]3 years ago
6 0

Answer:

<h2><u>1</u><u>3</u><u> </u><u>1</u><u>2</u><u>0</u></h2>

Step-by-step explanation:

hope it helps u too

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