(Q25).For the following A.Ps, write the first term and the common difference:

(i) 3, 1, – 1, – 3,….     (ii) – 5, – 1, 3, 7,….

(iii)
1
3
 ,
5
3
 ,
9
3
 ,
13
3
 ,.........     (iv) 0.6, 1.7, 2.8, 3.9,…

SI. No. A.P First term t1 = a1 Common difference d = t2-t1 = a2-a1
(i) 3, 1, -1, -3, .... a = t1 = 1 - = -
(ii) -5, -1, 3, 7, ...... - -1 - (-)= -1 + =
(iii)
1
3
 ,
5
3
 ,
9
3
 ,
13
3
 ,.......
5
3
 -
=
-
=
(iv) 0.6, 1.7, 2.8, 3.9, ..... 1.7 - =