Question

$\log (a+b)+\log (a-b)-\log \left(a^2-b^2\right)=$

• A. 0
• B. 1
• C. $\left(a^2-b^2\right)$
• D. $a^2+b^2$

Answer 1

Answer: (A)

(i) Use the identity $\log m+\log n-\log p=\log mn/p$
(ii) Use $\log x+\log y=\log xy$ and $\log p-\log q=$ $\log (p/q)$