Math Problem Statement

Match each function f(x) with its correct inverse from the given options.

Solution

The image you've uploaded contains a set of functions f(x)f(x) on the left side and possible corresponding inverses f1(x)f^{-1}(x) on the right side. We need to match each function with its correct inverse. Let’s go through the functions and determine the correct inverses step by step.

  1. f(x)=6x+4f(x) = 6x + 4
    To find the inverse, we solve for xx: y=6x+4y = 6x + 4 Subtract 4 from both sides: y4=6xy - 4 = 6x Divide by 6: x=y46x = \frac{y - 4}{6} Therefore, the inverse is: f1(x)=x46f^{-1}(x) = \frac{x - 4}{6} This corresponds to option (b).

  2. f(x)=exf(x) = e^x
    The inverse of the exponential function exe^x is the natural logarithm, ln(x)\ln(x), so: f1(x)=ln(x)f^{-1}(x) = \ln(x) This corresponds to option (c).

  3. f(x)=x4f(x) = x^4
    The inverse of x4x^4 is the fourth root of xx, so: f1(x)=x4f^{-1}(x) = \sqrt[4]{x} This corresponds to option (d).

  4. f(x)=4xf(x) = 4^x
    The inverse of 4x4^x is the logarithm base 4, so: f1(x)=log4(x)f^{-1}(x) = \log_4(x) This corresponds to option (f).

  5. f(x)=x6f(x) = x^6
    The inverse of x6x^6 is the sixth root of xx, so: f1(x)=x6f^{-1}(x) = \sqrt[6]{x} This corresponds to option (e).

  6. f(x)=x64f(x) = \sqrt[4]{x - 6}
    To find the inverse, we first square both sides to remove the fourth root: y4=x6y^4 = x - 6 Add 6 to both sides: x=y4+6x = y^4 + 6 Therefore, the inverse is: f1(x)=x4+6f^{-1}(x) = x^4 + 6 This corresponds to option (g).

  7. f(x)=6(x+4)f(x) = 6(x + 4)
    This can be simplified as f(x)=6x+24f(x) = 6x + 24. Solving for the inverse: y=6x+24y = 6x + 24 Subtract 24 from both sides: y24=6xy - 24 = 6x Divide by 6: x=y246x = \frac{y - 24}{6} Therefore, the inverse is: f1(x)=x64f^{-1}(x) = \frac{x}{6} - 4 This corresponds to option (a).

Summary of matches:

  1. f(x)=6x+4f(x) = 6x + 4f1(x)=x46f^{-1}(x) = \frac{x - 4}{6} (b)
  2. f(x)=exf(x) = e^xf1(x)=ln(x)f^{-1}(x) = \ln(x) (c)
  3. f(x)=x4f(x) = x^4f1(x)=x4f^{-1}(x) = \sqrt[4]{x} (d)
  4. f(x)=4xf(x) = 4^xf1(x)=log4(x)f^{-1}(x) = \log_4(x) (f)
  5. f(x)=x6f(x) = x^6f1(x)=x6f^{-1}(x) = \sqrt[6]{x} (e)
  6. f(x)=x64f(x) = \sqrt[4]{x - 6}f1(x)=x4+6f^{-1}(x) = x^4 + 6 (g)
  7. f(x)=6(x+4)f(x) = 6(x + 4)f1(x)=x64f^{-1}(x) = \frac{x}{6} - 4 (a)

Would you like more details or have any questions about this?

Here are 5 related questions to consider:

  1. How do you find the inverse of a function in general?
  2. What is the relationship between logarithmic and exponential functions?
  3. Why does the function f(x)=xnf(x) = x^n have an inverse only for certain values of nn?
  4. Can you explain the process of solving for the inverse step-by-step for different types of functions?
  5. How do you determine the domain and range of an inverse function?

Tip: When finding the inverse of a function, always remember that you are essentially "undoing" the operations of the original function, reversing each step in the reverse order.

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Math Problem Analysis

Mathematical Concepts

Algebra
Exponential Functions
Logarithmic Functions
Inverse Functions

Formulas

Inverse of a linear function: f^{-1}(x) = (x - b)/a for f(x) = ax + b
Inverse of exponential functions: f^{-1}(x) = log_b(x) for f(x) = b^x
Inverse of power functions: f^{-1}(x) = x^(1/n) for f(x) = x^n

Theorems

Inverse Function Theorem
Properties of Exponents and Logarithms

Suitable Grade Level

Grades 10-12