Q18 of 176 Page 8

In the following A.P., find the missing terms:
54, □,□, 42

Here, a = 54 , n = 4 and l = 42

We have,

l = a + (n – 1)d

⇒42 = 54 + (4 – 1)d

⇒42 = 54 + 3d

⇒–12 = 3d

So, the missing terms are –

a₂ = a + d = 54 – 4 = 50

a₃ = a + 2d = 54 + 2(–4) = 54 – 8 = 46

Hence, the missing terms are 50 and 46

For what value of n are the nth term of the following two A.P's the same. Also find this term

63, 65, 67, ... and 3, 10, 17, ...

In the following A.P., find the missing terms:

5, □,□, 9

In the following A.P., find the missing terms:

– 4, □,□,□,□, 6

In the following A.P., find the missing terms:

□, 13, □, 3

In the following A.P., find the missing terms:54, □,□, 42