y=√x-1
2007-10-18 07:57:33 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
A relation is always between two sets or of one set on itself. You haven't given the sets.
Suppose x and y are both in the set of real numbers. Then the relation isn't a function. This is because √(-1) isn't defined. A "function" must be defined for all values in it's domain, otherwise it isn't well-defined and isn't really a function.
The other condition required for a function to be well-defined is that for each x in the domain, there is only one y in the codomain related to it. Your equation satisfies this condition.
If you limit your domain to positive values then it will be a function.
2007-10-18 08:30:24 · answer #1 · answered by Demiurge42 7 · 0⤊ 1⤋
yes
2007-10-18 08:04:36 · answer #2 · answered by Anonymous · 1⤊ 0⤋
of course
for sure
definitely
why not ?
Oh, yeah
lol
yes because it involves x and y
2007-10-18 08:02:45 · answer #3 · answered by H . B . K 2 · 0⤊ 1⤋