Math Problem Statement

Determine the transformations needed to go from f(x) = log3(x) to g(x) = log3(x+5). Also, identify the vertical asymptote, domain, and range of g(x).

Solution

To address the problem in the image:

The problem involves transforming the function f(x)=log3xf(x) = \log_3{x} to g(x)=log3(x+5)g(x) = \log_3{(x+5)}.

Step 1: Analyze the transformation

The transformation involves changing xx to x+5x+5. This indicates a horizontal shift of the graph of f(x)=log3xf(x) = \log_3{x} by 5 units to the left, because adding +5+5 to xx shifts the graph left.

Step 2: Vertical asymptote

The vertical asymptote of a logarithmic function occurs where the argument of the logarithm becomes zero. For g(x)=log3(x+5)g(x) = \log_3{(x+5)}: x+5=0    x=5x+5 = 0 \implies x = -5 Thus, the vertical asymptote is at x=5x = -5.

Step 3: Domain and range

  • Domain: The argument of the logarithm, x+5x+5, must be positive: x+5>0    x>5x+5 > 0 \implies x > -5 So, the domain is (5,)(-5, \infty).

  • Range: The range of any logarithmic function is (,)(-\infty, \infty).

Correct answers:

  1. The transformation is 5 units to the left.
  2. The vertical asymptote of g(x)=log3(x+5)g(x) = \log_3{(x+5)} is x=5x = -5.

Would you like detailed graphs or further explanations?


Here are 5 related questions for further exploration:

  1. What is the effect of a vertical shift on the graph of a logarithmic function?
  2. How does changing the base of a logarithm affect the graph?
  3. Can you determine the horizontal asymptote for any transformed logarithmic function?
  4. How do we find the inverse of g(x)=log3(x+5)g(x) = \log_3{(x+5)}?
  5. How does the domain of log3(x+5)\log_3{(x+5)} change if the transformation is log3(x5)\log_3{(x-5)}?

Tip: Always rewrite logarithmic functions in terms of their transformations to quickly identify shifts and asymptotes.

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Math Problem Analysis

Mathematical Concepts

Logarithmic Functions
Function Transformations
Domain and Range

Formulas

Transformation formula: log_b(x+c) indicates a horizontal shift
Vertical asymptote: Set argument equal to zero

Theorems

Properties of logarithmic functions
Rules for transformations of functions

Suitable Grade Level

Grades 9-12