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

Algebra ->  Functions -> 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       Log On


   

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) About Me  (Show Source):
You can put this solution on YOUR website!
1.) y = x - 1
Range: all reals
Domain: all reals
graph%28600%2C600%2C-10%2C10%2C-10%2C10%2Cx-1%29
2.) y = 1/x
Range: y+%3E+0and y+%3C+0
Domain: x+%3E+0 and x+%3C+0
graph%28600%2C600%2C-10%2C10%2C-10%2C10%2C1%2Fx%29
3.) y = 1/(x^2 + 1)
Range: 0+%3C+y+%3C=+1
Domain: all reals
graph%28600%2C600%2C-10%2C10%2C-10%2C10%2C1%2F%28x%5E2%2B1%29%29
4.) y = 1/squareroot of x^2 + x + 1
x^2 + x + 1 = 0
v(-1/2,3/4)
Range: 0+%3C+y+%3C=+2%2Asqrt%283%29%2F3
Domain: all reals
graph%28600%2C600%2C-20%2C20%2C-10%2C10%2C1%2Fsqrt%28x%5E2%2Bx%2B1%29%29