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1. a+1a=4

A. 14
B. 14
C. 14
D. 14

Answer: Option A

Explanation:

a^{2} + \frac{1}{a^{2}} = a^{2} + \frac{1}{a^{2}} = {(a + \frac{1}{a})}^{2} - 2 . a . \frac{1}{a} = {(4)}^{2} - 2 = 16 - 2 = 14 a n s .

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