Find the sum of the first six terms of a geometric progression .​

Question:

Find the sum of the first six terms of a geometric progression.

1,3,9,....

Step-by-step explanation:

For a geometric progression, the sum of n terms is:

In the given sequence:

So:

step-by-step explanation:

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.