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  4. log (a+b)+ log (a-b)- log (a2-b2)=

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

Logarithms

Solution:

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