[" h term is purly seal in an AP "],[12+8i,11+6i,10+9i,--js]

Which term of the sequence 12+8i ,\ 11+6i ,\ 10+4i ,... is (a) purely real and (b). purely imaginary?

Which term of the sequence 12+8i,11+6i,10+4i,cdots is a purely real b.purely imaginary?

(i) Find the number of terms in the A.P. 8, 12, 16, ........124 (ii) Find the number of terms in the A.P. 75, 70, 65, .....15

(i) Find the number of terms in the A.P. 8, 12, 16, ........124 (ii) Find the number of terms in the A.P. 75, 70, 65, .....15

Find the (i) nth term and (ii) 12th term of the AP 14, 9, 4, -1, -6, …

Find the (i) nth term and (ii) 16th term of the AP 3, 5, 7, 9, 11, …

The mode of the observations 8, 9, 10, 11, 12, 8, 9, 12, 9, 8, 9, 11, 9, 8 is

(i) An AP 5, 12, 19,.. has 50 terms. Find its last term. Hence, find the sum of its last 15 terms. (ii) An AP 8, 10, 12,..has 60 terms. Find its last term. Hence, find the sum of its last 10 terms.

(i) Find the 10th term from the end of the A.P. 82, 79, 76, .... , 4 (ii) Find the 16th term from the end of the A.P. 3, 6, 9, .... 99