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    HSC 2016 MX1 Marathon (archive)

    Re: HSC 2016 3U Marathon Complete the square*√((n+0.5)^2 -0.25) - n and as n gets large, the 0.25 is negligent, so you get n+0.5 - n = 0.5. Don't care about absolute values cuz n is large in the positive direction.
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