" 3.A.P."(13)/(5),(7)/(5),(1)/(5),-1,..." Of "10" Find the term. "

For the A.P. : 1/2,(-1)/2,(-3)/2,(-5)/2 ………, write the first term a and the common difference d. Find the 7^(th) term .

The sum of all the terms of the A.P.7,10,13,... l is 1242. where l is the last term of the A.P. Find the value of l .

The third term of an A.P. is (1)/(5) and the 5th term is (1)/(3) . Show that the sum of 15 terms of the A.P. is 8.

In an A.P., if 5 ^(th) term is (1)/(7) and 7^(th) term is (1)/(5), then the sum of first 35 terms is

Find the sum of indicated number of terms of the following A.P.’s : - 0.5,-1.0, -1.5 , ............ , 10 terms, 50 terms .

Find the 5th term of A.P if a=1 , d=2

In the A.P. 3,5,7,…43 , find the middle term :

Find whether 55 is a term of the A.P. 7, 10, 13, … or not. If yes, find which term is it.

Find the sum of indicated number of terms in each of the following A.Ps. (ii) -0.5, -1.0, -1.5, ....., 10 terms.

Find 10^(th) term of AP:5,1,-3,-7