Having a bit of trouble with the following problem:
The sum of the first three terms of a geometric series is 21. The sum of terms 4 through 6 is 168. Find the first three terms.
Would greatly appreciate help.
Hello, Ventus!
Do you know anything about Geometric Series?
The sum of the first three terms of a geometric series is 21.
The sum of terms 4 through 6 is 168.
Find the first three terms.
The first six terms are: .
We are told: .
Divide [2] by [1]: .
. . And we have: .
Substitute into [1]: .
Therefore, the first three terms are: .