Math Problem Statement

find the inverse f(x)=^3√x+7 +5

Solution

To find the inverse of the function f(x)=x+73+5f(x) = \sqrt[3]{x + 7} + 5, follow these steps:

Step 1: Replace f(x)f(x) with yy

y=x+73+5y = \sqrt[3]{x + 7} + 5

Step 2: Solve for xx in terms of yy

  1. Subtract 5 from both sides: y5=x+73y - 5 = \sqrt[3]{x + 7}

  2. Cube both sides to eliminate the cube root: (y5)3=x+7(y - 5)^3 = x + 7

  3. Finally, subtract 7 from both sides: x=(y5)37x = (y - 5)^3 - 7

Step 3: Replace xx with f1(x)f^{-1}(x) and yy with xx

Thus, the inverse function is: f1(x)=(x5)37f^{-1}(x) = (x - 5)^3 - 7

Final Answer:

f1(x)=(x5)37f^{-1}(x) = (x - 5)^3 - 7

Would you like further clarification on any step, or have any additional questions?

Here are some related questions:

  1. How do we graph the original function and its inverse?
  2. What is the domain and range of the function and its inverse?
  3. How do we verify that two functions are inverses of each other?
  4. How do cube roots affect the shape of a graph compared to square roots?
  5. What happens to the inverse of a function when there are transformations such as translations or scalings?

Tip: When finding the inverse of a function, always swap the roles of xx and yy and solve for the new yy.

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Math Problem Analysis

Mathematical Concepts

Algebra
Inverse Functions
Cube Root Functions

Formulas

f(x) = ^3√(x + 7) + 5
f^{-1}(x) = (x - 5)^3 - 7

Theorems

Inverse Function Theorem

Suitable Grade Level

Grades 9-11