MATH

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What is the sum of the first 70 consecutive odd numbers?

  • MATH -

    1 through 2*70 - 1 or 139 figure that out by experiment

    average = (1+139)/2 = 70

    70 * 70 = 4900

  • MATH -

    By the way
    what we really did was :

    n[(n*2-1)+1 ]/2

    which is n^2

    or 70^2

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