chrisdacarnut wrote:Df={x|-4<x<} = (4,-4]
I don't understand.
The domain of function
equals the set of all
such that
equals the half-open interval from
to
.
Actually, there are errors. Assuming that the interval part,
is correct, the missing number (above) is
, and the expression would better look like this:
Comment:
should be less than or equal to
because the interval is closed at the
end. Since the same is open at the
end, that would mean x is less than 4.