In order for the square root to be defined, must be a nonnegative number. Therefore, the domain is all x such that (can you put this in terms of intervals?). The range is (why?).
Hey guys, I'm having a problem with finding the domain and range of this function:
f(x) = sqrt(X^2 - 1)
this is what i thought:
x|xER
y|yER, y≥1
but when you substitute 1 for x, you get y = 0, so it disproves what I thought to be correct.
the second one I need help with is the function:
f(x) = sqrt(x^2 - 1)/x-1
i have no idea what the domain/range for that function could be, i've never seen something like that.