(Q24).Write first four terms of the AP, when the first term a and the common difference d are given as follows

(i) a = 10, d = 10     (ii) a = -2, d = 0

(iii) a = 4, d = – 3     (iv) a = – 1, d =
1
2

(v) a = – 1.25, d = – 0.25

t1 = a1 d t2 or a2 = a + d t3 or a3 = a + 2d t4 or a4 = a + 3d A.P.
(i) 10 10

10 + 10

=

10 + 2 × 10

= 10 +

=

10 + 3 × 10

= 10 +

=

10, , , ,....
(ii) -2 0

-2 + 0

= -

-2 + 0

= -

-2 + 0

= -

-2, -, -, -,....
(iii) 4 -3

4 + (-3)

=

4 + (-3) × 2

= 4 - = -

4 + (-3) × 3

= 4 - = -

4, , -, -,....
(iv) -1
1
2
-1 +
1
2
 =
-
-1 + 2(
1
2
 )

= - + =

-1 + 3(
1
2
 )
=
- +
2
 =
-1,
-
 , ,
, ........
(v) -1.25 -0.25

-1.25 + (-0.25)

= -

-1.25 + (-0.25) × 2

= -1.25 -

= -

-1.25 + (-0.25) × 3

= -1.25 -

= -

 -1.25, -, -, -,....