Math Problem Statement

Which transformations are needed to graph the function h(x) = 2^(x-1) - 2?

Solution

This question involves the transformation of the exponential function f(x)=2xf(x) = 2^x to the given function h(x)=2x12h(x) = 2^{x-1} - 2.

Explanation:

  1. Horizontal Shift:

    • The term x1x-1 inside the exponent indicates a horizontal shift of 1 unit to the right.
  2. Vertical Shift:

    • The term 2-2 outside the function indicates a vertical shift of 2 units downward.

Thus, the correct transformation is:

  • Horizontal shift 1 unit to the right.
  • Vertical shift 2 units downward.

The correct answer is C: "The graph of f(x)=2xf(x) = 2^x should be horizontally shifted 1 unit to the right and vertically shifted 2 units downward."

Additional Details:

  • The horizontal shift moves the asymptote from y=0y = 0 to y=2y = -2, because the function is shifted downward by 2 units.
  • The domain of h(x)h(x) remains (,)(-\infty, \infty), but the range changes to (2,)(-2, \infty).

Let me know if you'd like further assistance with this problem or if you'd like to see the graph of this function!


Related Questions:

  1. How does shifting an exponential function affect its asymptote?
  2. What is the domain and range of the function h(x)=2x12h(x) = 2^{x-1} - 2?
  3. How do transformations affect the rate of growth of an exponential function?
  4. What happens to the graph of f(x)=2xf(x) = 2^x when it is reflected across the x-axis?
  5. How can transformations be combined to model real-world exponential growth or decay?

Tip:

When analyzing transformations, always focus on changes to the base function step-by-step, identifying horizontal, vertical, and reflection transformations systematically.

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Math Problem Analysis

Mathematical Concepts

Algebra
Exponential Functions
Graph Transformations

Formulas

Transformation of exponential functions
h(x) = a^(x-h) + k, where h and k represent shifts

Theorems

Properties of Exponential Functions

Suitable Grade Level

Grades 9-11