State whether the given geometric series have sums.
6. 5 + 10 + 20 + 40 + …
8. 6 + 2 + 2/3 + 2/9 + …
10. 1 + .1 + .01 + .001 + …
12. 1 – 1/5 + 1/25 – 1/125 + …
6. The numbers are growing exponentially so there is no sum
8. The numbers are shrinking exponentially so there is a sum, which is 9.
Based on this, can you find the other two?
You are very welcome!
:P