SOLUTION: this question asks to: "Find the domain and range of each function": 1.) y=x-1 2.) y=1/x 3.) y=1/(x^2+1) 4.) y=1/squareroot of x^2+x+1 can someone please show me how to do

Question 46855: this question asks to:
"Find the domain and range of each function":
1.) y=x-1
2.) y=1/x
3.) y=1/(x^2+1)
4.) y=1/squareroot of x^2+x+1
can someone please show me how to do these? thanks for the help and please do help.
Answer by Nate(3500) (Show Source): You can put this solution on YOUR website!
1.) y = x - 1
Range: all reals
Domain: all reals

2.) y = 1/x
Range: and
Domain: and

3.) y = 1/(x^2 + 1)
Range:
Domain: all reals

4.) y = 1/squareroot of x^2 + x + 1
x^2 + x + 1 = 0
v(-1/2,3/4)
Range:
Domain: all reals

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