Question

Need some help with geometric series

Answer 1

I've already done 1-2, but the third question is what's getting me. I'm not sure exactly what it's it asking, and I'm not sure how to use that formula.

Answer 2

Also
The average common ratio of ball 1 is 0.8
The average common ratio for ball 2 is 0.64
The average common ratio for ball 3 is 0.29

Answer 3

It's asking, in a somewhat confusing way, for you to add the 5 heights. You need to use the summation formula to do it.

Answer 4

Ah, alright.
Also, if you don't mind my asking, what do I plug in for each variable in the summation formula?

Answer 5

To use the formula, a1 is the value of the first term. r is the common ratio in the series. n is the number of terms you want to add up (might need to be the number you want to add minus one, trying to find a resource to check).

Answer 6

Nope, n is just the number of terms you want to add up.

Answer 7

Thanks ^-^

Answer 8

My pleasure :)