How will I do question 4 iii functions C3

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BULL14
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http://pmt.physicsandmathstutor.com/...20C3%20OCR.pdf

The answer is
k is greater than 0 and less than or equal to 2.

I understand that it has to be greater than 0,as it's modulus, but I don't know where the two comes from?
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S.H.Rahman
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You haven't put a pic of the question up bud
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the bear
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if it is find the range you look at the y values.
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RDKGames
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(Original post by BULL14)
http://pmt.physicsandmathstutor.com/...20C3%20OCR.pdf

The answer is
k is greater than 0 and less than or equal to 2.

I understand that it has to be greater than 0,as it's modulus, but I don't know where the two comes from?
It would probably be helpful if you sketch how |f(x)| actually looks like, then see for which values of k does the line y=k intersect |f(x)| twice. Then the 2 is obvious.
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