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The function [tex]f(x) = x^2[/tex] has been translated 9 units up and 4 units to the right to form the function [tex]g(x)[/tex]. Which represents [tex]g(x)[/tex]?

A. [tex]g(x) = (x+9)^2 + 4[/tex]
B. [tex]g(x) = (x+9)^2 - 4[/tex]
C. [tex]g(x) = (x-4)^2 + 9[/tex]
D. [tex]g(x) = (x+4)^2 + 9[/tex]


Sagot :

Sure, let's find the translated function step-by-step.

1. Translation 4 units to the right:
- When a function [tex]\(f(x)\)[/tex] is translated [tex]\(c\)[/tex] units to the right, the transformed function becomes [tex]\(f(x - c)\)[/tex].
- For [tex]\(f(x) = x^2\)[/tex] and [tex]\(c = 4\)[/tex], the transformed function is [tex]\(f(x - 4) = (x - 4)^2\)[/tex].

2. Translation 9 units up:
- When a function is then translated [tex]\(d\)[/tex] units upwards, you add [tex]\(d\)[/tex] to the whole function.
- For the function [tex]\((x - 4)^2\)[/tex] and [tex]\(d = 9\)[/tex], the final transformed function is [tex]\((x - 4)^2 + 9\)[/tex].

So, putting it all together:

- Translating [tex]\(f(x) = x^2\)[/tex] 4 units to the right yields [tex]\((x - 4)^2\)[/tex].
- Translating [tex]\((x - 4)^2\)[/tex] 9 units up gives [tex]\((x - 4)^2 + 9\)[/tex].

Thus, the function [tex]\(g(x)\)[/tex] that represents this transformation is:
[tex]\[ g(x) = (x - 4)^2 + 9 \][/tex]

Therefore, the correct choice is:

[tex]\[ \boxed{g(x) = (x - 4)^2 + 9} \][/tex]