Graphical Reasoning

Discussion in 'Other Pre-University Math' started by nycmathguy, Jul 6, 2021.

  1. nycmathguy

    nycmathguy

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    Graph the function and determine the
    interval(s) for which f(x) ≥ 0.

    56. f(x) = 4x + 2

    Show me the steps. No sample given by Ron Larson.
     
    nycmathguy, Jul 6, 2021
    #1
  2. nycmathguy

    MathLover1

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    f(x) ≥ 0
    0= 4x + 2
    4x=-2
    x=-1/2

    the interval for which f(x) ≥ 0 is [-1/2, infinity)
     

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    MathLover1, Jul 6, 2021
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  3. nycmathguy

    nycmathguy

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    Where did infinity come from?

    All similar questions are set to zero and solved for x. Yes?

    What about if the function is f(x) = 1/sqrt{4x + 2}?
     
    nycmathguy, Jul 7, 2021
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