Context: Determine the location and value of the absolute extreme values of f on the given interval, if they exist. f(x) = (x-2)^(4/3) on [-7,7]
Question
Context: Determine the location and value of the absolute extreme values of f on the given interval, if they exist. f(x) = (x-2)^(4/3) on [-7,7]
Solution
To find the absolute extreme values of a function on a given interval, we need to follow these steps:
- Find the derivative of the function.
- Set the derivative equal to zero and solve for x to find critical points.
- Evaluate the function at the critical points and at the endpoints of the interval.
- The largest and smallest values are the absolute maximum and minimum, respectively.
Let's apply these steps to the function f(x) = (x-2)^(4/3) on the interval [-7,7].
- The derivative of f(x) = (x-2)^(4/3) is f'(x) = (4/3)(x-2)^(1/3).
- Setting f'(x) = 0 gives (4/3)(x-2)^(1/3) = 0. Solving for x gives x = 2. So, 2 is a critical point.
- Now, evaluate the function at the critical point and at the endpoints of the interval:
- f(-7) = ((-7)-2)^(4/3) = (-9)^(4/3) = 81
- f(2) = (2-2)^(4/3) = 0
- f(7) = (7-2)^(4/3) = 5^(4/3) = 125^(1/3) = 5
- Comparing these values, we see that the absolute maximum is 81 at x = -7, and the absolute minimum is 0 at x = 2.
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