froglover88 froglover88

23-06-2021
Mathematics

contestada

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

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sqdancefan sqdancefan

30-06-2021

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

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janlee113 janlee113

01-07-2021

Answer:

13 120

Step-by-step explanation:

hope it helps u too

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