00:02
We want to find the domain of the function g of rs is equal to the square root of r times s.
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This question is testing our understanding of two primary concepts.
00:15
The first is domain, that is, the range or rather variable space for which a function has a defined range.
00:23
And secondly, the use of multivariable functions, the functions of multiple variables, in this case of r and of s.
00:30
So let's remember what domain means.
00:33
Domain is all xy, or in this case, for our variables, r s, for which f, or in this case, g, is real and defined.
00:42
So for this to be the case, the denominator in a function must not be equal zero, any number under the square root time i be positive, and so on...