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If general term of an A.P. is 3n then find common difference.(a) 2(b) 3(c) 5(d) 6The question was posed to me in an international level competition.My query is from Arithmetic Progression(A.P.) topic in portion Sequences and Series of Mathematics – Class 11

Answer»

The correct ANSWER is (b) 3

The EXPLANATION: Given, an = 3n.

We know, d = an-an-1 = 3n – 3(n-1) = 3.



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