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Thread: Sequence Corundum

  1. January 2nd 2010, 12:53 AM #1
    mayank
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    Sequence Corundum

    kindly help in solving the attached problem
    I am stuck in between
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    Last edited by mayank; January 2nd 2010 at 03:26 AM.
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  2. January 2nd 2010, 09:36 PM #2
    Drexel28
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    Quote Originally Posted by mayank View Post
    kindly help in solving the attached problem
    I am stuck in between
    The recurrence relation is solvable to a_n=\tfrac{c}{2}n(n-1)+2(1-n)(n-1) for some constant c. Do you see how?
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  3. January 2nd 2010, 10:36 PM #3
    mayank
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    Quote Originally Posted by Drexel28 View Post
    The recurrence relation is solvable to a_n=\tfrac{c}{2}n(n-1)+2(1-n)(n-1) for some constant c. Do you see how?
    Hey
    I have not done this method
    but I solved the question by progressions and some logic later on to arrive at answer. My answer is coming out 249. and I know my method is not appropriate can you deduce the answer by recurrence relation
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