Question

PLEASE HELP WILL MEDAL!!! (ans. must be correct)

Here is a series written in expanded form:

3 + 8 + 13 + ... + 33

Which of the following summation notations represents this series?

Answer 1

It should be between A and B
hint: plug in 6 or 7 and see if that term is 33 (it should be the last term in the series)

Answer 2

There is only one. I'll try..