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Math Help - Sum of squares of even numbers

  1. #1
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    Sum of squares of even numbers

    What is the value of (sum of j2 where j is an element of S)
    where S = {all even numbers greater than zero and less than 11}

    Last edited by mr fantastic; November 27th 2009 at 04:23 PM. Reason: Changed post title
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  2. #2
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    I assume the expression is \sum_{j\in S} j^2 where S=\{n\in\mathbb{N}\mid0< n<11,\ n\mbox{ is even}\}. I don't really know what to say except that you need to know what the notations \sum and \{\dots\mid\dots\} mean. If you know this, you can calculate this quantity directly, without using any general formula.
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  3. #3
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    Quote Originally Posted by erinneedshelp View Post
    what is the value of (sum of j2 where j is an element of s)
    where s = {all even numbers greater than zero and less than 11}
    2^2 + 4^2 + 6^2 + 8^2 + 10^2 = ....
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