Given log 10 a = b, express 10 2b - 3 in terms of a.

Given, ⇒ log 10 a = b ∴ a = 10 b . Simplifying 10 2b - 3 we get, ⇒ 10 2b - 3 = 10 2b .10 -3 = = . Hence, 10 2b - 3 =