If a+1/a=11 ,find .the value of a2+1/a2
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a – (1/a))2 = a2 + (1/a2 ) – 2
⇒ (a – (1/a))2 = 11 -2
⇒ (a – (1/a))2 = 9
⇒ a – (1/a) =
⇒ a – (1/a) = 3
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