SOLUTION: I am not understanding domains. My assignment is to state the domains for: g(x)=2x + 1/x - 3 h(x) =3x^2 + 5x

SOLUTION: I am not understanding domains. My assignment is to state the domains for: g(x)=2x + 1/x - 3 h(x) =3x^2 + 5x - 3 l(x) = 2x + 3 m(x) = 3/x^2+7

Question 91553: I am not understanding domains. My assignment is to state the domains for:
g(x)=2x + 1/x - 3
h(x) =3x^2 + 5x - 3
l(x) = 2x + 3
m(x) = 3/x^2+7

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
state the domains for:
g(x)= 2x + 1/x - 3
The domain on this one is all real number except +3, you can see that if x = 3
we would have division by 0, a big no-no
:
h(x) = 3x^2 + 5x - 3
A parabola, all real numbers
:
l(x) = 2x + 3
A linear line, all real numbers
:
m(x) = 3/x^2+7
Even tho this one has a denominator, there is no way that x^2 can be -7 so it
is all real numbers also

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