Originally Posted by
Jhevon ok, what you did is a start, we found where it IS zero, we want to find where it's bigger. so we can check the intervals that our solution breaks up the real line into
we have x = -1 and x = 3
so draw a number line and mark this on it. now, test numbers on both ends of the number line, and inbetween the numbers. if you get a positive answer, then that region is where we are greater than zero, if you get a negative number, that's where it's less than zero
incidentally, domain is just the set of x-values for which a function is defined. we have to solve for where this expression is positive, because the logarithm is only defined where its argument is positive. so once you answer the above question, that's your domain