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Find the set of values for mod(x-5) < mod(3x-2) watch

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    So I have the correct answer.

    But there are two intersects, and you get 4 possible x values in solving

    x< -3/2 or x> 7/4

    How am I supposed to fiugre out how to solve the x values (i.e. which ones do I choose).

    I had to draw the graph, work out the intersect points - but surely I should know what I am looking for before hand?

    i can upload my work if anoynoe wants, but since there are 4 possible x values how do i go about selecting the right ones in future
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    Why not just put them all back in to the original equation?
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    (Original post by Student403)
    Why not just put them all back in to the original equation?
    there is that I suppose, can't believe I forgot to do that. But surely when solving these questions, people know where to make the bracket negative, if you know what I am saying.
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    (Original post by Mihael_Keehl)
    there is that I suppose, can't believe I forgot to do that. But surely when solving these questions, people know where to make the bracket negative, if you know what I am saying.
    No I seem to remember just plugging all in to the original or sketching the graph to see when I did C4
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    (Original post by Student403)
    No I seem to remember just plugging all in to the original or sketching the graph to see when I did C4
    I see. Thanks.
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    (Original post by Mihael_Keehl)
    I see. Thanks.
    You're welcome
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    (Original post by Student403)
    Why not just put them all back in to the original equation?
    :spank: it is an inequality
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    (Original post by the bear)
    :spank: it is an inequality
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    (Original post by Student403)
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    (Original post by the bear)
    :spank: it is an inequality
    kek just semantics haha
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    (Original post by the bear)
    Haven't seen you trigger so much in a day!

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    (Original post by Mihael_Keehl)
    kek just semantics haha
    anyway... i always prefer to draw the graph first to see what is happening. as you say there are 2 intersections. we want the shallow V graph to lie below the steep V graph...
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    (Original post by Student403)
    Haven't seen you trigger so much in a day!

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    (Original post by the bear)
    anyway... i always prefer to draw the graph first to see what is happening. as you say there are 2 intersections. we want the shallow V graph to lie below the steep V graph...
    I did do this.

    But when you solve algreabraically for x there are 4 possible values which x satisfies, I wonder is there a way to know which ones to look for prior to actually working out the values.
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    (Original post by Mihael_Keehl)
    I did do this.

    But when you solve algreabraically for x there are 4 possible values which x satisfies, I wonder is there a way to know which ones to look for prior to actually working out the values.
    i expect if you are genius you can figure it out... us lesser mortals need a pic
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    (Original post by the bear)
    i expect if you are genius you can figure it out... us lesser mortals need a pic
    ah okay thnx

    Name:  FP2 Ineqx.jpg
Views: 117
Size:  34.8 KB
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    (Original post by Mihael_Keehl)
    ah okay thnx

    Name:  FP2 Ineqx.jpg
Views: 117
Size:  34.8 KB
    Nice calculator
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    (Original post by Student403)
    Nice calculator
    lolz that one is fx-991DE Plus
    Spoiler:
    Show
    its in german :facepalm2:
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    (Original post by Mihael_Keehl)
    lolz that one is fx-991DE Plus
    Spoiler:
    Show
    its in german :facepalm2:
    Oops lol - I use the fx-115ES PLUS
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    (Original post by Student403)
    Oops lol - I use the fx-115ES PLUS
    is that better mine/better than fx991-es

    I also have a ti84 + c silver calcualsatos
 
 
 
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