2 years ago

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]2 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]2 years ago

6 0

Answer:

Step-by-step explanation:

hope it helps u too

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

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