who can help me to determine the domain of a functions?

Question

anonymous · Answer

i think anyone could.  are they rational functions?

anonymous · Answer

post your questions

anonymous · Answer

This is completely off topic, but Level 76?? WHOA??

anonymous · Answer

$$\chi have -1,0,1,2$$

anonymous · Answer

Set of allowable inputs to a function, start with that...

anonymous · Answer

What does "X have -1,0,1,2"  mean?

anonymous · Answer

Often they describe the domain (inputs) as a set X of values and the outputs or range as a set Y.

anonymous · Answer

Anybody home?

anonymous · Answer

yes..

anonymous · Answer

but why there's some range and domain has it answer like this:$$y \ge0$$

anonymous · Answer

Say I said to you that the domain was all the numbers bigger or equal to 0.

Then I could write x>= 0, it's just a short way of writing a description.

All those x's (inputs) will produce values of y and maybe (depends on the function) that set is the same as the inputs and I can write y>=0 for the range.