Math Problem Statement

solve

The functions f and g are defined as follows: f(x) = 2x^3 + 2 and g(x) = 2x - 1. Find f(-2) and g(-6). Simplify your answers as much as possible.

Solution

To solve for f(2)f(-2) and g(6)g(-6) using the given functions:

  1. Given Functions:

    • f(x)=2x3+2f(x) = 2x^3 + 2
    • g(x)=2x1g(x) = 2x - 1
  2. Finding f(2)f(-2): Substitute x=2x = -2 into f(x)f(x): f(2)=2(2)3+2f(-2) = 2(-2)^3 + 2 Calculate (2)3=8(-2)^3 = -8, so: f(2)=2(8)+2=16+2=14f(-2) = 2(-8) + 2 = -16 + 2 = -14 Thus, f(2)=14f(-2) = -14.

  3. Finding g(6)g(-6): Substitute x=6x = -6 into g(x)g(x): g(6)=2(6)1g(-6) = 2(-6) - 1 Calculate 2(6)=122(-6) = -12, so: g(6)=121=13g(-6) = -12 - 1 = -13 Thus, g(6)=13g(-6) = -13.

Final Answers:

  • f(2)=14f(-2) = -14
  • g(6)=13g(-6) = -13

Would you like additional details on any steps?


Here are 5 related questions to deepen your understanding:

  1. How would you calculate f(x)f(x) and g(x)g(x) for other values of xx?
  2. What would be the result of f(x)+g(x)f(x) + g(x) for a given xx?
  3. How can we find the roots of f(x)=0f(x) = 0 or g(x)=0g(x) = 0?
  4. What is the degree and leading coefficient of f(x)f(x)?
  5. How would you determine the inverse of g(x)g(x)?

Tip: To evaluate a function, substitute the given value for the variable and follow the order of operations carefully.

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Math Problem Analysis

Mathematical Concepts

Function evaluation
Polynomial functions
Linear functions

Formulas

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

Theorems

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Suitable Grade Level

Grades 9-10