The sum to infinity of a geometric sequence is 27/2 while the sum of first three terms is 13. Find the sum of the first five terms.
Answers
Answered by
2
Step-by-step explanation:
If a sequence is geometric there are ways to find the sum of the first n terms, denoted Sn, without actually adding all of the terms.
To find the sum of the first Sn terms of a geometric sequence use the formula
Sn=a1(1−rn)1−r,r≠1,
where n is the number of terms, a1 is the first term and r is the common ratio.
The sum of the first n terms of a geometric sequence is called geometric series.
Similar questions