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May I have some help on these Inequality questions?

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    I am really stuck on question 2 parts b) and c) in the image I have attached! Would anyone mind showing me how to do them?

    I would really appreciate it!
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    (Original post by dp00)
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    I am really stuck on question 2 parts b) and c) in the image I have attached! Would anyone mind showing me how to do them?

    I would really appreciate it!
    For quadratics, it is easy to see what is happening when you sketch them. So sketch B and look for which values of x will give you an answer less than 0, so that will be domain where the parabola goes below the x-axis.
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    (Original post by RDKGames)
    For quadratics, it is easy to see what is happening when you sketch them. So sketch B and look for which values of x will give you an answer less than 0, so that will be domain where the parabola goes below the x-axis.
    I know how to do that! I need to show working though! Would you mind showing me how to work it out?
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    (Original post by dp00)
    I know how to do that! I need to show working though! Would you mind showing me how to work it out?
    But technically that IS showing working...

    Other than that, you can show that the minimum point is is blow the x-axis, and is in the middle of the two roots, therefore the domain will be anything in between the two roots.
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    (Original post by dp00)
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    I am really stuck on question 2 parts b) and c) in the image I have attached! Would anyone mind showing me how to do them?

    I would really appreciate it!
    Solve for x for part b.
    Whatever you get for the critical values, x is in between them.

    Lower Cv < x < Upper Cv

    For the second part, just find the values of x which satisfy both ranges of part a and part b - the set of values which satisfy both curves.
 
 
 
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