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CBSE Notes 2011-2012 » XI-Maths

Sequences and Series

The nth term of a progression is 3n + 1, prove that it is an A.P. Find its 6th term.

Short answer question

The nth term of a progression is 3n + 1, prove that it is an A.P. Find its 6th term.

How many terms are there in the A.P. (i) 10,13,16,.......... , 49 (ii) 7,13,19,........., 199 (iii) ...

Short answer question

How many terms are there in the A.P.
(i) 10,13,16,.......... , 49 (ii) 7,13,19,........., 199 (iii) 14 1/2,12,....... ,-38?

A sequence is given by an = 2 - 3n. Prove that it is an A.P., find its 5th term.

Short answer question

A sequence is given by an = 2 - 3n. Prove that it is an A.P., find its 5th term.

Which term of the A.P. (i) 5,8,11,....... is 320 ? (ii) 4,9,14,........ is 114 ? (iii) 20, 16,12,......

Short answer question

Which term of the A.P.
(i) 5,8,11,....... is 320 ? (ii) 4,9,14,........ is 114 ? (iii) 20, 16,12,...... is - 96 ?

Is 310 a term of the sequence 3,8,13,.......?

Short answer question

Is 310 a term of the sequence 3,8,13,.......?

Which term of an A.P. 7-4i, 6 - 2i, 5-0i, 4+ 2i,......... is (i) purely real(ii) purely imaginary ?

Short answer question

Which term of an A.P. 7-4i, 6 - 2i, 5-0i, 4+ 2i,......... is (i) purely real(ii) purely imaginary ?

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