Friday, September 22, 2017

Q1 by Group 1


1 comment:

  1. For (b), from line 2,
    n x n = 13 x 15 + 1
    In fact, from here, we know 13 is n-1 and 15 is n+1.
    So, actually need not do the square root.
    We can deduce that n = 14 (by observation).

    The rest are well represented :)

    [4 points]

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