Question

Find the domain of the logarithmic function.
f(x) = log9 (x + 4)

Answer 1

your input for a log must be positive so solve
\[x+4>0\] in one step for your answer

Answer 2

so is it 4 and the infinity sign?

Answer 3

no it is
\[x>-4\] so
\[(-4,\infty)\] in interval notation