7. n2-1 is divided by 8, if n is
O (A). An integer
O (B). Rational number
Ο Ο
(C). Odd integer
(D). even integer
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1
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Answer:
B) Rational number..
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Show that n2−1 is divisible by 8, if n is an odd positive integer. We know that any odd positive integer is of the form 4q+1 or, 4q+3 for some integer q. Hence, n2−1 is divisible by 8.Nov 22, 2019
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