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  1. #1
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    help with algebra problem

    !10x-7!>8 The solution of this inequality consists of one or more of the intervals
    (-infinity,A) , (A,B) , and (B, Infinity) where A>B


    !=absolute bars..couldnt find em on the computer


    Find A = ?
    Find B = ?
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  2. #2
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    Hint: \displaystyle |X| > a is equivalent to \displaystyle X < -a and \displaystyle X > a.
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  3. #3
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    Quote Originally Posted by Prove It View Post
    Hint: \displaystyle |X| > a is equivalent to \displaystyle X < -a and \displaystyle X > a.
    i solved for x and i got x < -1/10 or x > 3/2

    im just confused about what goes where
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  4. #4
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    Quote Originally Posted by wwinston View Post
    i solved for x and i got x < -1/10 or x > 3/2

    im just confused about what goes where
    Correct. Now how can you write \displaystyle x < -\frac{1}{10} using set notation?

    How can you write \displaystyle x > \frac{3}{2} using set notation?
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  5. #5
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    This is a homework question for an online class.. infinity or -infinity does not work for A or B
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  6. #6
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    Quote Originally Posted by wwinston View Post
    This is a homework question for an online class.. infinity or -infinity does not work for A or B
    And it certainly shouldn't! You were told to use the forms
    "(-infinity,A) , (A,B) , and (B, Infinity) where A>B"
    Which of the two numbers you got is larger?
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