Math Problem Statement

Let f(x) = 3x + 3 and g(x) = 5x^2 - 1. Evaluate (f ∘ g)(2).

Solution

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text = pytesseract.image_to_string(img) textThe image contains a problem that involves evaluating the composition of functions. Specifically, you are given the following:

  • f(x)=3x+3f(x) = 3x + 3
  • g(x)=5x21g(x) = 5x^2 - 1

The task is to evaluate (fg)(2)(f \circ g)(2), which represents the composition of the functions ff and gg evaluated at x=2x = 2.

To solve this:

  1. First, evaluate g(2)g(2): g(x)=5x21g(x) = 5x^2 - 1 Substituting x=2x = 2: g(2)=5(2)21=5(4)1=201=19g(2) = 5(2)^2 - 1 = 5(4) - 1 = 20 - 1 = 19

  2. Next, evaluate f(g(2))f(g(2)), which is the same as f(19)f(19): f(x)=3x+3f(x) = 3x + 3 Substituting x=19x = 19: f(19)=3(19)+3=57+3=60f(19) = 3(19) + 3 = 57 + 3 = 60

Thus, the value of (fg)(2)(f \circ g)(2) is 60.

Would you like further clarification on any part of the solution? Here are some related questions to deepen your understanding:

  1. How do compositions of functions differ from simple addition or subtraction of functions?
  2. What is the general process for finding (fg)(x)(f \circ g)(x) for any functions f(x)f(x) and g(x)g(x)?
  3. Can we apply the same approach to compositions involving more complex functions, like trigonometric or exponential functions?
  4. How do you approach solving compositions in cases where one function involves a higher degree (e.g., g(x)=x3g(x) = x^3)?
  5. What is the significance of function composition in real-world applications, such as physics or economics?

Tip: When working with function compositions, always remember to evaluate the inner function first and then use that value in the outer function.

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Math Problem Analysis

Mathematical Concepts

Function Composition
Substitution

Formulas

f(g(x)) = f(5x^2 - 1) = 3(5x^2 - 1) + 3
g(x) = 5x^2 - 1

Theorems

Function Composition

Suitable Grade Level

Grades 9-11