Math Problem Statement

Write a function g whose graph represents a reflection in the y-axis of the graph of f(x) = ln(x) - 2. g(x) = ?

Solution

The problem asks to write a function g(x)g(x) whose graph represents a reflection in the yy-axis of the graph of f(x)=ln(x)2f(x) = \ln(x) - 2.

Solution:

To reflect a function across the yy-axis, you replace xx with x-x in the function. So, for the function f(x)=ln(x)2f(x) = \ln(x) - 2, reflecting it across the yy-axis gives:

g(x)=f(x)=ln(x)2g(x) = f(-x) = \ln(-x) - 2

Thus, the reflected function is:

g(x)=ln(x)2g(x) = \ln(-x) - 2

Note that this new function, g(x)=ln(x)2g(x) = \ln(-x) - 2, is only defined for x<0x < 0, since the natural logarithm, ln(x)\ln(x), is only defined for positive values of xx, and x-x must be positive.

Would you like any further details or have questions?

Relative Questions:

  1. What is the domain of the function g(x)=ln(x)2g(x) = \ln(-x) - 2?
  2. How does the reflection of a function affect its graph visually?
  3. What is the inverse of f(x)=ln(x)2f(x) = \ln(x) - 2?
  4. How would you translate f(x)=ln(x)2f(x) = \ln(x) - 2 instead of reflecting it?
  5. What happens if you reflect the function across the xx-axis instead?

Tip:

When reflecting a function across the yy-axis, remember to replace xx with x-x in the equation of the function.

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Math Problem Analysis

Mathematical Concepts

Algebra
Functions
Transformations

Formulas

g(x) = f(-x)

Theorems

Reflection of functions across axes

Suitable Grade Level

Grades 9-12