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  1. J

    Sum and Product of Roots Help!

    Use the definition of absolute values, so you would get |α - β|= sqrt ((α-β)^2) and you should be able to do it from there.
  2. J

    2011 HSC Past Paper Question

    From part i) you can replace the u with an x and since they are both equal you can add them and you'll get 2I = 1/x(4-x) and integrate that as normal.
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