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Math Help - inequality A level question

  1. #1
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    inequality A level question

    |x-3| >(greater than or equal to) |x| - |3|



    how do i go about to solve this???


    PS why bitdefender anti virus only picking up malware on this forums???
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  2. #2
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    Re: inequality A level question

    Quote Originally Posted by kingmaths View Post
    |x-3|\ge |x| - |3|
    Here is a hint:
    |x|=|x-3+3|\le |x-3|+|3|
    How can that be rearranged to look this problem?
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  3. #3
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    Re: inequality A level question

    ok,, but one thing i want to know, do I need to get rid of || sign, if yes how??
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    Re: inequality A level question

    Quote Originally Posted by kingmaths View Post
    ok,, but one thing i want to know, do I need to get rid of || sign, if yes how??
    Is not it true for any x?
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  5. #5
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    Re: inequality A level question

    Quote Originally Posted by kingmaths View Post
    |x-3| >(greater than or equal to) |x| - |3|



    how do i go about to solve this???


    PS why bitdefender anti virus only picking up malware on this forums???
    Looks like a straightforward application of the reverse triangle inequality to me...
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