Question

Two APs (Arithmetic Progression) have the same common difference. The first term of one of these is -1 and that of the other is -8. Find the difference between their 4th term.​

Answer 1

The first term of the arithmetic progression is

−

6

. So we know that the A.P. starts as

−

6

,

.

.

.

The common difference is

4

so we know that the next term is

−

6

+

4

i.e.

−

2

. Similarly, now the

3

r

d

term is

−

2

+

4

i.e.

2

and so on. This sequence is represented by the option '

c

' and thus '

c

' is the correct answer.