calculus

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For what positive numbers will the square of a number exceed twice the number?

  • calculus -

    n^2>2n
    n^2-2n>0
    n(n-2)>0

    So, n must be 3 or greater for the second term to be positive. If it is not positive, the inequality is not true.

  • calculus -

    0.1
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    0.7
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    0.9
    There all work

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