If a - 1/a =8 ; FInd a+1/a.
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a-1/a = 8
(a-1/a)² = 8²
(a+1/a)²-4.a.1/a = 64
(a+1/a)²-4 = 64
(a+1/a)² = 64+4
(a+1/a)² = 68
a+1/a = √68
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