Check answers to critical point, extrema questions

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SUMMARY

The discussion centers on verifying answers to critical points and extrema in calculus, specifically regarding the function f(x) and its minimum value. The participant asserts that the absolute minimum value of f(x) on the interval [0, ∞) is 2 at x = 1, challenging the interpretation that the answer could be represented as the ordered pair (1, 2). This highlights the importance of clarity in defining minimum values in mathematical contexts.

PREREQUISITES
  • Understanding of calculus concepts, particularly critical points and extrema.
  • Familiarity with function analysis and interval notation.
  • Knowledge of absolute minimum and maximum definitions.
  • Ability to interpret and analyze mathematical equations and graphs.
NEXT STEPS
  • Review calculus textbooks focusing on critical points and extrema.
  • Practice problems involving absolute minimum and maximum values of functions.
  • Explore graphical representations of functions to visualize extrema.
  • Learn about the implications of interval notation in calculus problems.
USEFUL FOR

Students studying calculus, educators teaching mathematical concepts, and anyone looking to deepen their understanding of critical points and extrema in functions.

tjohn101
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Homework Statement


If my answers to the questions in the attachments could be checked that would be great. All work is done, and the questions in the pictures are fairly quick and simple. I want to be sure I got them correct.

Thank you!

Homework Equations





The Attempt at a Solution

 

Attachments

  • LAB #7 numbers 1-4.jpg
    LAB #7 numbers 1-4.jpg
    47.6 KB · Views: 468
  • LAB #7 numbers 5-7.jpg
    LAB #7 numbers 5-7.jpg
    40.4 KB · Views: 459
  • LAB #7 numbers 13-15.jpg
    LAB #7 numbers 13-15.jpg
    42.9 KB · Views: 476
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Is it just me, or does everyone like those choices? When f(x) has an absolute minimum value on the interval [0, \infty) of 2 when x = 1, I don't consider the answer to "find the absolute minimum for f(x)" of (1,2) to be correct. The answer should be 2.
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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