If 18, a, (b – 3) are in AP, then find the value of (2a – b).

Question

Philoid · Accepted Answer

Since, the terms are in an AP, therefore

a - 18 = (b - 3) - a

⇒ 2a - b = - 3 + 18

⇒ 2a - b = 15

∴ 2a - b = 15