If a is positive and \({a^2} + \frac{1}{{{a^2}}} = 7,\;{\rm{then\;find – McqOptions

MCQOPTIONS

1.	If a is positive and \({a^2} + \frac{1}{{{a^2}}} = 7,\;{\rm{then\;find}}\:{a^3} + \frac{1}{{{a^3}}}.\)
A.	21
B.	3√7
C.	18
D.	7√7
Answer» D. 7√7

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