Math Problem Statement
Solution
The given function is , and you are asked to find the value of the derivative at .
Key points:
- The absolute value function introduces a potential non-differentiability at .
- We will first check if the function is differentiable at .
Step-by-Step Analysis:
-
Piecewise Definition of the Function: The function can be written as:
x - 3 & \text{if } x \geq 3 \\ 3 - x & \text{if } x < 3 \end{cases}$$ -
Derivative on Either Side of :
- For , , and its derivative is .
- For , , and its derivative is .
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At :
- As we approach from the right (), .
- As we approach from the left (), .
- Since the left-hand and right-hand derivatives are not equal, the function is not differentiable at .
Conclusion:
The derivative does not exist at .
The correct answer is (E) Nonexistent.
Would you like further explanation on any of the steps?
Here are five related questions:
- What does it mean for a function to be differentiable at a point?
- How do you compute the derivative of an absolute value function?
- What is the significance of the left-hand and right-hand derivatives in determining differentiability?
- How do piecewise functions affect differentiability and continuity?
- Can you provide more examples of functions that are not differentiable at a point?
Tip: Always check both continuity and the equality of the left-hand and right-hand derivatives when dealing with absolute value functions at critical points.
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Math Problem Analysis
Mathematical Concepts
Calculus
Differentiation
Absolute Value Function
Piecewise Functions
Formulas
f'(x) = lim (h -> 0) (f(x + h) - f(x)) / h
Theorems
Non-Differentiability at a Sharp Corner
Left-hand and Right-hand Derivatives
Suitable Grade Level
Grades 11-12, College Level