Solution:
a, 9, b, 25 are in AP.
We have, 9 – a = b – 9 = 25 – b
First case: b – 9 = 25 – b
⇒ b + b = 22 + 9 = 34
⇒ 2b = 34
⇒ b= 17
Using, a – b = a – 9
⇒ 9 + 9 = a + b
⇒ a + b = 18
If the numbers a, 9, b, 25 from an AP, find a and b
If the numbers a, 9, b, 25 from an AP, find a and b