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Which of the following represents [tex]$-3(x)$[/tex] if [tex]$g(x)$[/tex] is the function [tex][tex]$f(x)$[/tex][/tex] after a shift to the left 4 units and up 6 units?

A. [tex]$g(x)=f(x-4)-6$[/tex]
B. [tex]$g(x)=f(x+6)$[/tex]
C. [tex][tex]$g(x)=f(x+4)-6$[/tex][/tex]
D. [tex]$g(x)=f(x+4)+6$[/tex]


Sagot :

To determine which of the given options correctly represents the function [tex]\( g(x) \)[/tex] as [tex]\( f(x) \)[/tex] after shifting to the left by 4 units and up by 6 units, we need to understand how function transformations work.

1. Shifting to the left by 4 units:
A leftward shift of a function [tex]\( f(x) \)[/tex] by 4 units is achieved by replacing [tex]\( x \)[/tex] with [tex]\( x + 4 \)[/tex]. Thus, [tex]\( f(x) \)[/tex] becomes [tex]\( f(x + 4) \)[/tex].

2. Shifting up by 6 units:
An upward shift of a function [tex]\( f(x) \)[/tex] by 6 units is achieved by adding 6 to the entire function. Thus, [tex]\( f(x) \)[/tex] becomes [tex]\( f(x) + 6 \)[/tex].

Combining these two transformations, we first shift [tex]\( f(x) \)[/tex] to the left by 4 units, resulting in [tex]\( f(x + 4) \)[/tex]. Then, we shift this new function [tex]\( f(x + 4) \)[/tex] up by 6 units, which results in [tex]\( f(x + 4) + 6 \)[/tex].

Thus, the expression for [tex]\( g(x) \)[/tex] should be:
[tex]\[ g(x) = f(x + 4) + 6 \][/tex]

Hence, the correct choice is:
[tex]\[ g(x) = f(x+4) + 6 \][/tex]

This matches the fourth option in the given list. So, the answer is:
[tex]\[ 4 \][/tex]