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Math Help - Use of Sigma

  1. #1
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    Use of Sigma

    I NEED HELPPPPP.....

    4
    E 6/j^2
    j=1

    i keep on getting 51/4 whats my mistake?
    heres the equation i got s = 4(6+3/8) / 2

    im not asking for answers...as you can see i already got the equation but i keep on getting the wrong answer
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  2. #2
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    Quote Originally Posted by jordangiscool View Post
    I NEED HELPPPPP.....

    4
    E 6/j^2
    j=1

    i keep on getting 51/4 whats my mistake?
    heres the equation i got s = 4(6+3/8) / 2
    By definition:

    \sum_{j = 1}^{4} \frac{6}{j^2} = \frac{6}{1^2} + \frac{6}{2^2} + \frac{6}{3^2} + \frac{6}{4^2} = \, ....
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  3. #3
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    that's not an arithmetic progression
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  4. #4
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    Hello songoku
    Quote Originally Posted by songoku View Post
    that's not an arithmetic progression
    Correct! What made you think it was?

    Grandad
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