SOLUTION: I am confuse some could someone help please. Explain the domain and range of a function. Under what circumstances would the domain be something other than "all real numbers"? P

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Question 423579: I am confuse some could someone help please.
Explain the domain and range of a function. Under what circumstances would the domain be something other than "all real numbers"? Provide an example of a function whose domain does not include all real numbers.

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the domain is the group of numbers that are fed onto some function ___ usually the x values

the range is the group of numbers that result from the operation of the function ___ usually the y values

y = 2x / (x + 1) ___ when x=-1 , the function (value of y) is undefined (we can't divide by zero)
so the domain would be all reals EXCEPT -1