what are the domains and ranges of these graphs?

Question

y=x^2

y= sqrt x

y=(1/x)

y=| x |

y=x^3

Answer 1

y=x^2
D: all real number
R: y ≥ 0

y= sqrt x
D: x ≥ 0
R: y ≥ 0

y=(1/x)
D: x ≠ 0
R: y ≠ 0

y=| x |
D: all real number
R: y ≥ 0

y=x^3
D: all real number
R: all real number

Answer 2

y=x^2 Domain = all real numbers, Range y=/> 0

y= sqrt x Domain and range = all positive real numbers

y=(1/x) Domain = all reals except 0, range = all reals

y=| x | Domain = all reals. Range = all positive reals plus zero

y=x^3 Dommain and range = all real numbers

Answer 3

Nice way to do your homework. You're lucky I'm nice.

y=x^2 domain is all numbers, range is 0 and all positive numbers

y = sqrt x domain is zero and all positive numbers, range is zero and all positive numbers

y= 1/x domain is all numbers except 0, range is all numbers except zero

y = absolute value of x, domain is all numbers, range is 0 and all positive numbers

y = x^3 domain is all numbers, range is all numbers

Answer 4

D= all reals R = + reals
D = + reals R = + reals
D = all reals except 0 R = all reals
D = all reals R = + reals
D = all reals R = all reals

over the set of reals. If you are considering complex numbers then ignore these.

Answer 5

Hmm..
1>
Domain- all Real numbers,
Range all real numbers grater than zero

2>
D-All positive real write as [0,infinity)
R-All real

3>
D-All real-{0} if you wish write it as, (-infinity,0)U(0,infinity)
R-All real-{0}

4>
D- All real
R- Positive real

5>
D>All real
R>All real

Answer 6

how do you get answers to this question an i dont?

boo.

:)