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college algebra

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Find the maximum or minimum for f(x)=3x^2+x+1

  • college algebra - ,

    using Calculus ...
    f'(x) = 6x + 1

    6x+1 = 0
    x = -1/6
    f(-1/6) = 3(1/36) - 1/6 + 1 = 11/12

    since the parabola opens upwards,
    the minimum value is 11/12

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