Which of the following is a Pythagorean-triplet? (i) n, (n2 � 1) and (n2 + 1) (ii) (n – 1), (n2 – 1) and (n2 + 1) (iii) (n + 1), (n2 – 1) and (n2 + 1) (iv) 2n, (n2 – 1) and (n2 + 1)
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(iv)2n,(n2-1)and(n2+1)
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