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Math Help - rewrite summation

  1. #1
    Junior Member
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    rewrite summation

    \sum^4_{j=1}  \frac {j}{j+1}

    The question is....rewrite this summation so the index variable is k and the starting value is 5

    so. j = 1, k = 5....so j = k -4

    So plugging these in I come up with:

    \sum^8_{k=5}  \frac {k-4}{k+5}

    Is this correct?
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  2. #2
    Junior Member
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    if j = k - 4, then j + 1 = (k -4) + 1 = k-3, not k+5
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  3. #3
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    Doh....I had it written down incorrectly. thanks
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