Question

if 12a,a+b,2a,b are in A.P then(b-a)

Answer 1

Answer:

Correct option is

D

a=18,b=8

a,13,b,3....are in A.P then,

∴commondifferenced=13−a=3−b=b−13

⇒b−13=3−b

⇒2b=16

∴b=8

now 13−a=3−b

⇒13−a=3−8

⇒a=18

a=18,b=8

Answer 2

Answer:

Given: 18, a,(b−3) are in AP. So, difference between two consecutive terms is same. a−18=b−3−a. a+a−b=−3+18. 2a−b=15. Was this answer helpful?

Explanation: