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yKpoI14uk [10]
3 years ago
13

What is the range of the function y=3 Sqrt x+8

Mathematics
2 answers:
Goshia [24]3 years ago
5 0

Answer:

range is -∞<y<∞

Step-by-step explanation:

y=\sqrt[3]{x+8}

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

y=\sqrt[3]{x+8}

x=\sqrt[3]{y+8}

Take cube on both sides

x^3= y+8

Subtract 8 from both sides

y=x^3-8

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<∞

ValentinkaMS [17]3 years ago
4 0

Answer:

(-\infty,+\infty)

Step-by-step explanation:

The given function is

y=\sqrt[3]{x+8}

The range refers to the values of y for which  x is defined.

We solve for x to obtain;

y^3=x+8

x=y^3-8

This is a polynomial function in y.

x is defined for all values of y.

Therefore the range is all real numbers.

or

(-\infty,+\infty)

The first choice is correct.

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