Math Problem Statement

Answer the questions

Graph the function f(x) = -2 * 2^(1/3 * x) + 3 and identify its key characteristics, including domain, range, y-intercept, asymptote, increasing and decreasing intervals, and end behavior.

Solution

Let's analyze the function f(x)=2213x+3f(x) = -2 \cdot 2^{\frac{1}{3} x} + 3 and fill in each characteristic:

  1. Domain: The function f(x)=2213x+3f(x) = -2 \cdot 2^{\frac{1}{3} x} + 3 is an exponential function, which is defined for all real values of xx.

    • Domain: (,)(-\infty, \infty)
  2. Range: Since the function is of the form abcx+da \cdot b^{cx} + d, where a=2a = -2 (negative value) and d=3d = 3, it has a horizontal asymptote at y=3y = 3 and will approach this value from below as xx \to \infty. This makes the range (,3)(-\infty, 3).

    • Range: (,3)(-\infty, 3)
  3. y-intercept: To find the yy-intercept, set x=0x = 0: f(0)=22130+3=21+3=1f(0) = -2 \cdot 2^{\frac{1}{3} \cdot 0} + 3 = -2 \cdot 1 + 3 = 1

    • y-intercept: (0,1)(0, 1)
  4. Asymptote: The function has a horizontal asymptote as yy approaches the constant term, y=3y = 3, as xx \to \infty.

    • Asymptote: y=3y = 3
  5. Increasing/Decreasing Intervals: Since a=2a = -2 is negative, the function is decreasing for all xx.

    • Increasing Interval: \emptyset (null set)
    • Decreasing Interval: (,)(-\infty, \infty)
  6. End Behavior:

    • As xx \to -\infty, f(x)f(x) \to -\infty because the exponential term 213x2^{\frac{1}{3}x} approaches zero, making f(x)f(x) go to -\infty.

    • As xx \to \infty, f(x)3f(x) \to 3 (approaching the horizontal asymptote from below).

    • End Behavior:

      • As xx \to -\infty, f(x)f(x) \to -\infty
      • As xx \to \infty, f(x)3f(x) \to 3

Would you like further explanation on any of these characteristics?


Here are 5 additional questions that might interest you:

  1. How do you find the range of an exponential function?
  2. Why does a negative coefficient affect the direction of an exponential function's growth or decay?
  3. What other types of functions have horizontal asymptotes?
  4. How does the base of the exponent affect the shape of the graph?
  5. Can an exponential function ever cross its horizontal asymptote?

Tip: When graphing exponential functions, always identify the horizontal asymptote first to understand the behavior of the function.

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Math Problem Analysis

Mathematical Concepts

Exponential Functions
Graphing
Asymptotes
Intervals
End Behavior

Formulas

f(x) = a * b^(cx) + d

Theorems

Properties of Exponential Functions
End Behavior in Functions

Suitable Grade Level

Grades 10-12