what is the lim of (((1/x)-(1/2))/x-2) , as x approaches 2

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02-02-2015
Mathematics

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what is the lim of (((1/x)-(1/2))/x-2) , as x approaches 2

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konrad509 konrad509 · Answer 1 · 2015-02-02T13:01:26+01:00

konrad509 konrad509

02-02-2015

I assume the denominator is [tex]x-2[/tex].

[tex]\lim_{x\to2}\dfrac{\dfrac{1}{x}-\dfrac{1}{2}}{x-2}=\\ \lim_{x\to2}\dfrac{\dfrac{2}{2x}-\dfrac{x}{2x}}{x-2}=\\ \lim_{x\to2}\dfrac{\dfrac{2-x}{2x}}{x-2}=\\ \lim_{x\to2}\dfrac{2-x}{2x(x-2)}}=\\ \lim_{x\to2}-\dfrac{x-2}{2x(x-2)}}=\\ \lim_{x\to2}-\dfrac{1}{2x}}=\\ -\dfrac{1}{2\cdot2}=\\ -\dfrac{1}{4}= [/tex]

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