Function and Algebra Concepts Question
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Grade 11 Function and Algebra Concepts CCSS: HSF-IF.C.7a
If a function has a critical point at x = a, which of the following must be true?
- The function has a local maximum or minimum at x = a.
- The function is continuous at x = a.
- The function is differentiable at x = a.
- All of the above.