Answer
True
Work Step by Step
The logarithm of a sum can be understood to be something along the lines of $$\log_{b}(m + n)$$ Equaling this expression to an arbitrary constant $c$, we can write: $$log_{b}(m + n) = c$$ and convert it into an exponent as so: $$b^c = m + n$$ Because there is no other step to take after this expression, we can conclude that there is no property for the logarithm of a sum that is applicable for a general form $\log_{b}(m + n)$.
