Try this solution:
1. according to the definition of logarithm
where a∈(0;1)∪(1;+oo) and b>0.
2. The variable is only in b, using item 1. it is possible to write: x+3>0.
⇒ x>-3.
Answer: D(f)=(-3;+oo).
1. according to the definition of logarithm
2. The variable is only in b, using item 1. it is possible to write: x+3>0.
⇒ x>-3.
Answer: D(f)=(-3;+oo).
