Sequence and Series of Real Numbers

If the

*p*^{th}term of an A. P. is*q*and*q*^{th}term is*p*, prove that its*n*^{th}term is (*p*+*q*−*n*).
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CBSE Board Paper 2017

If 2k + 1, 13, and 5k – 3 are three consecutive terms in an A.P., then k =

(A) 17

(B) 13

(C) 4

(D) 9

(A) 17

(B) 13

(C) 4

(D) 9

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Gujarat Board Paper 2013