From the given values of ‘x’ which value would satisfy log (x + 3) + log (x – 3) = 4log2?
From the given values of ‘x’ which value would satisfy log (x + 3) + log (x – 3) = 4log2? Correct Answer 5
Given, log (x + 3) + log (x – 3) = 4log2 ➩ log ((x + 3) (x – 3)) = log24 ➩ log (x2 – 9) = log16 ➩ x2 – 9 = 16 ➩ x2 = 16 + 9 ➩ x2 = 25 ➩ x = +5, -5
মোঃ আরিফুল ইসলাম
Feb 20, 2025