If \({x^{2n}}\; + \;\frac{1}{{{x^{2n}}}}\; = \;k\), then find the valu – McqOptions

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1.	If \({x^{2n}}\; + \;\frac{1}{{{x^{2n}}}}\; = \;k\), then find the value of \({x^n} - \frac{1}{{{x^n}}}.\)
A.	\(\sqrt {k - 2} \)
B.	\(\sqrt {k\; + \;2}\)
C.	k – 2
D.	k + 2
Answer» B. \(\sqrt {k\; + \;2}\)

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