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Given the function \( f(x) = \sqrt[3]{x-14} \), find the inverse of \( f(x) \).

A. \( f^{-1}(x) = (x-14)^3 \)
B. \( f^{-1}(x) = x^3 + 14 \)
C. \( f^{-1}(x) = (x+14)^3 \)
D. [tex]\( f^{-1}(x) = x^3 - 14 \)[/tex]


Sagot :

To find the inverse of the function \(f(x) = \sqrt[3]{x-14}\), follow these steps:

1. Express \(f(x)\) in terms of \(y\):
We write the original function as:
[tex]\[ y = \sqrt[3]{x - 14} \][/tex]

2. Swap \(x\) and \(y\):
To find the inverse function, swap the variables \(x\) and \(y\):
[tex]\[ x = \sqrt[3]{y - 14} \][/tex]

3. Solve for \(y\):
To isolate \(y\), first cube both sides of the equation to remove the cube root:
[tex]\[ x^3 = y - 14 \][/tex]

4. Isolate \(y\):
Now add 14 to both sides of the equation to solve for \(y\):
[tex]\[ y = x^3 + 14 \][/tex]

Thus, the inverse function is:
[tex]\[ f^{-1}(x) = x^3 + 14 \][/tex]

Given the answer choices:
- A. \(f^{-1}(x) = (x-14)^3\)
- B. \(f^{-1}(x) = x^3 + 14\)
- C. \(f^{-1}(x) = (x+14)^3\)
- D. \(f^{-1}(x) = x^3 - 14\)

The correct inverse function is:
[tex]\[ f^{-1}(x) = x^3 + 14 \][/tex]

Therefore, the correct choice is:
[tex]\[ \boxed{2} \][/tex]