Hi,

I am stuck with finding the domain and range of . I think that the domain is all values except . But what about the range?

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- April 14th 2010, 12:11 AMtoprun91Domain and range
Hi,

I am stuck with finding the domain and range of . I think that the domain is all values except . But what about the range? - April 14th 2010, 12:22 AMRapha
- April 14th 2010, 03:09 AMHallsofIvy
Another way to find range is to "reverse" the fraction- solve for x- so that domain and range are swapped.

If then [tex]y(x-1)= xy- y= x. Then xy- x= y so x(y- 1)= y. The fraction inverts into . Now we can see that y can be any number except 1 so that the range of the original fraction is, indeed, R\{1}.