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Rd Chapter 9- Arithmetic Progressions Ex-9.2 Interview Questions Answers

Question 1 : Show that the sequence defined by an = 5n – 7 is an A.P., find its common difference.

Answer 1 :


Question 2 : Show that the sequence defined by an = 3n² – 5 is not an A.P.

Answer 2 :


Question 3 : The general term of a sequence is given by an = -4n + 15. Is the sequence an A.P.? If so, find its 15th term and the common difference.

Answer 3 : General term of a sequence
an = -4n + 15

Question 4 :
Write the sequence with nth term :
(i) an = 3 + 4n
(ii) an = 5 + 2n
(iii) an = 6 – n
(iv) an = 9 – 5n
Show that all of the above sequences form A.P.

Answer 4 :


Question 5 : The nth term of an A.P. is 6n + 2. Find the common difference. [CBSE 2008]

Answer 5 :


Question 6 :
Justify whether it is true to say that the sequence, having following nth term is an A.P.
(i) an = 2n – 1
(ii) an = 3n² + 5
(iii) an = 1 + n + n²

Answer 6 :



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