The function [tex]g(x)[/tex] is a transformation of the cube root parent function, [tex]f(x)=\sqrt[3]{x}[/tex]. What function is [tex]g(x)[/tex]?

A. [tex]g(x)=3 \sqrt[3]{x}[/tex]

B. [tex]g(x)=\sqrt[3]{x+3}[/tex]

C. [tex]g(x)=\frac{1}{3} \sqrt[3]{x}[/tex]

D. [tex]g(x)=\sqrt[3]{x}+3[/tex]



Answer :

Let's analyze the given options and see how each one transforms the parent function [tex]\( f(x) = \sqrt[3]{x} \)[/tex].

Transformation of functions follows specific rules, and we will apply these rules to the parent function.

1. Option A: [tex]\( g(x) = 3 \sqrt[3]{x} \)[/tex]
- This represents a vertical stretch of the parent function by a factor of 3.
- This transformation implies that every value of [tex]\( \sqrt[3]{x} \)[/tex] is multiplied by 3.

2. Option B: [tex]\( g(x) = \sqrt[3]{x+3} \)[/tex]
- This represents a horizontal shift of the parent function to the left by 3 units.
- In general, [tex]\( \sqrt[3]{x+k} \)[/tex] shifts the graph left by [tex]\( k \)[/tex] units when [tex]\( k \)[/tex] is positive.

3. Option C: [tex]\( g(x) = \frac{1}{3} \sqrt[3]{x} \)[/tex]
- This represents a vertical shrink of the parent function by a factor of [tex]\(\frac{1}{3}\)[/tex].
- This transformation implies that every value of [tex]\( \sqrt[3]{x} \)[/tex] is multiplied by [tex]\(\frac{1}{3}\)[/tex].

4. Option D: [tex]\( g(x) = \sqrt[3]{x} + 3 \)[/tex]
- This represents a vertical shift of the parent function upwards by 3 units.
- In general, [tex]\( \sqrt[3]{x} + k \)[/tex] shifts the graph up by [tex]\( k \)[/tex] units when [tex]\( k \)[/tex] is positive.

Given the function is defined as a transformation of the cube root parent function and we are looking for the function [tex]\( g(x) = \sqrt[3]{x} + 3 \)[/tex], which corresponds to a vertical shift upward by 3 units, the correct transformation is described in Option D.

Thus, the function [tex]\( g(x) \)[/tex] is:
[tex]\[ g(x) = \sqrt[3]{x} + 3 \][/tex]

The function [tex]\( g(x) \)[/tex] you are looking for is [tex]\( g(x) = \sqrt[3]{x} + 3 \)[/tex], and it corresponds to Option D.