Respuesta :
Answer:
[tex](-\infty,+\infty)[/tex]
Step-by-step explanation:
The given function is
[tex]y=\sqrt[3]{x+8}[/tex]
The range refers to the values of y for which x is defined.
We solve for x to obtain;
[tex]y^3=x+8[/tex]
[tex]x=y^3-8[/tex]
This is a polynomial function in y.
x is defined for all values of y.
Therefore the range is all real numbers.
or
[tex](-\infty,+\infty)[/tex]
The first choice is correct.
Answer:
range is -∞<y<∞
Step-by-step explanation:
[tex]y=\sqrt[3]{x+8}[/tex]
Range of the given function is same as the domain of the inverse function
LEts find the inverse for the given equation
Swap the variables x and y . then solve for y
[tex]y=\sqrt[3]{x+8}[/tex]
[tex]x=\sqrt[3]{y+8}[/tex]
Take cube on both sides
[tex]x^3= y+8[/tex]
Subtract 8 from both sides
[tex]y=x^3-8[/tex]
Inverse function is a cubic function. For cubic function the domain is set of allr eal numbers. -∞<x<∞
Range of the given function is same as the domain of the inverse function
So range is -∞<y<∞