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Math Help - Sigma Notation

  1. #1
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    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
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  2. #2
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    Quote Originally Posted by nuckers View Post
    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?
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  3. #3
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    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
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  4. #4
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    Quote Originally Posted by nuckers View Post
    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 b and ends with b + 12, how many terms are there?
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  5. #5
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    Quote Originally Posted by Prove It View Post
    If the counter starts at b and ends with b + 12, how many terms are there?
    12 terms?
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  6. #6
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    Quote Originally Posted by nuckers View Post
    12 terms?
    No, 13. You've forgotten the starting term.
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  7. #7
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    Quote Originally Posted by Prove It View Post
    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
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