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if (p - 1/p = 2)...
we know that (a-b)^2=a^2 + b^2 - 2ab
=> (p - 1/p)^2= p^2 + (1/p)^2 - 2p1/2
2=p^2 + (1/p)^2 - 2
4 =p^2 + (1/p)^2
4 =p^2 + 1^2/p^2
4= p^2 +1/p^2 ...ans...
we know that (a-b)^2=a^2 + b^2 - 2ab
=> (p - 1/p)^2= p^2 + (1/p)^2 - 2p1/2
2=p^2 + (1/p)^2 - 2
4 =p^2 + (1/p)^2
4 =p^2 + 1^2/p^2
4= p^2 +1/p^2 ...ans...
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