Math Problem Statement

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Part 1

Find the absolute maximum and minimum values of each function over the indicated​ interval, and indicate the​ x-values at which they occur.

​f(x)equals=2 x cubed minus x squared minus 4 x plus 62x3−x2−4x+6​;

Solution

To find the absolute maximum and minimum values of the function f(x)=2x3x24x+6f(x) = 2x^3 - x^2 - 4x + 6 over the indicated interval, we need to follow these steps:


Steps:

  1. Find the derivative of f(x)f(x): The derivative f(x)f'(x) will help us locate the critical points. f(x)=6x22x4f'(x) = 6x^2 - 2x - 4

  2. Set f(x)=0f'(x) = 0 to find critical points: Solve 6x22x4=06x^2 - 2x - 4 = 0. This quadratic equation can be solved using the quadratic formula: x=b±b24ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} Substituting a=6a = 6, b=2b = -2, c=4c = -4: x=(2)±(2)24(6)(4)2(6)x = \frac{-(-2) \pm \sqrt{(-2)^2 - 4(6)(-4)}}{2(6)} x=2±4+9612x = \frac{2 \pm \sqrt{4 + 96}}{12} x=2±10012x = \frac{2 \pm \sqrt{100}}{12} x=2±1012x = \frac{2 \pm 10}{12} x=1212=1orx=812=23x = \frac{12}{12} = 1 \quad \text{or} \quad x = \frac{-8}{12} = -\frac{2}{3}

  3. Evaluate f(x)f(x) at critical points and endpoints: The absolute maximum and minimum values of a continuous function over a closed interval occur either at critical points or endpoints.

    Suppose the interval is [a,b][a, b]. Evaluate f(x)f(x) at:

    • Critical points x=1x = 1 and x=23x = -\frac{2}{3},
    • Endpoints x=ax = a and x=bx = b.
  4. Compare the results: The largest value is the absolute maximum, and the smallest value is the absolute minimum.


Let me calculate the exact values for you. Could you confirm the interval (e.g., [2,2][-2, 2]) or provide one?

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Math Problem Analysis

Mathematical Concepts

Calculus
Derivatives
Critical Points
Optimization

Formulas

First derivative: f'(x) = 6x^2 - 2x - 4
Quadratic formula: x = (-b ± √(b² - 4ac)) / 2a

Theorems

Extreme Value Theorem

Suitable Grade Level

Grades 11-12