Thread: Sigma Notation

How do you find how many terms this has if the lower limit is k=b and the upper limit is b+12, i know you subtract them and add 1, but i'm not sure how to do it with this

Can you please help

Thanks

Originally Posted by nuckers

How do you find how many terms this has if the lower limit is k=b and the upper limit is b+12, i know you subtract them and add 1, but i'm not sure how to do it with this

Can you please help

Thanks

What are we trying to sum?

not trying to sum anything up, just asking for the number of terms in each series

not sure how this is typed on here but i'll try and explain it

sigma sign, on the top is b+12 and on the bottom is k=b, and the equation is 3n-7

Originally Posted by nuckers

not trying to sum anything up, just asking for the number of terms in each series

not sure how this is typed on here but i'll try and explain it

sigma sign, on the top is b+12 and on the bottom is k=b, and the equation is 3n-7

If the counter starts at and ends with , how many terms are there?

Originally Posted by Prove It

If the counter starts at and ends with , how many terms are there?

12 terms?

Originally Posted by nuckers

12 terms?

No, 13. You've forgotten the starting term.

Originally Posted by Prove It

No, 13. You've forgotten the starting term.

oops, that would explain the +1, got a little confused with the K=b and the b+12
Thank you