1 of 2

ARITHMETIC

PROGRESSIONS

  • Finding missing terms in given

sequence

2 of 2

3) In the following APs, find the missing terms in the boxes :

i) 2, , 26

Sol:

a and a3 are given

a = 2,

a3 = 26,

We know that,

a3 = a + 2d

∴ 26

= 2

+ 2d

∴ 26 – 2

= 2d

∴ 24

= 2d

= d

∴ 12

= d

a2 = a + d

= 2

+ 12

= 14

∴ a2

2, 14 , 26

Now, lets find a2

We need to find a2

For given value of a3

Exercise 5.2 3(i)