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Math Help - Help needed on function question

  1. #1
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    Post Help needed on function question

    Is it possible to express f(x)=.sqrt(x^2/4 ) in terms of f(x)= x/2? If yes, what is the relation? If no, why is it not possible?

    could someone please help me on this question? thanks in advance
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  2. #2
    Junior Member tedii's Avatar
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    Quote Originally Posted by Keel View Post
    Is it possible to express f(x)=.sqrt(x^2/4 ) in terms of f(x)= x/2? If yes, what is the relation? If no, why is it not possible?

    could someone please help me on this question? thanks in advance
    The equation
    \sqrt{\frac{x^2}{4}}=

    \frac{\sqrt{x^2}}{\sqrt{4}}=

    \frac{|x|}{2}

    \mbox{In otherwords all the values are the same between the two equations except }x<0
    \mbox{Can you take it from here?}
    Last edited by tedii; September 26th 2009 at 06:06 AM.
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  3. #3
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    so how do i actually respond to the question? is it a "yes to a certain extent" anwser or "no, because you cant express it directly"
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  4. #4
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    Quote Originally Posted by Keel View Post
    so how do i actually respond to the question? is it a "yes to a certain extent" anwser or "no, because you cant express it directly"
    The first part of the question is answered "no". The second part of the questions is answered "because ....." (the dots are for you to fill in).
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