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if the nth term of a progression be a linear expression in n,then prove that this is an A.P.
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Answer 1

if the nth term of a progression be a linear expression in n, then prove that this progression is an AP. Given = nth term of AP is in linear expression in n. Now, for a sequence of numbers to be an AP, there must be a common difference. Since d = a, this sequence or progression is an AP.