代做MAT 17A Spring 2024 Discussion Worksheet 9代做Java程序
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Spring 2024
Discussion Worksheet 9
Problem 1 Dose-Response of Multi-vitamins
Multi-vitamins typically have dose-response curves of the following form.
where x is a measure of the daily dose, R is a measure of the health benefts, and a and k are positive constants.
(a) According to this model what is the health benefit to taking no vitamins? How does this change if you take a very small amount?
(b) what happens if you take an extremely large dose?
(c) what is the range of dosage where taking mnore will increase the benefit , and what is the range of dosage where taking more will decrease the beneft?
(d) Is there ever a negative beneft to taking the vitamins, according to this model? (e) Is there a dosage that maximizes or minimizes the health benefts?
(f) Graph the function and interpret your graph in terms ofthe health benefts of the multi-vitamins.
Problem 2
(a) sketch a function f(x) that is increasing but the rate of increase is decreasing. what are f'(x) and f"(x)? Is the function concave up or concave down?
(b) sketch a function f(x) that is decreasing bult the rate of decrease is decreasing. what are f'(x) and f"(x)? Is the function concave up or concave down?
Problem 3
Consider the function
y = f(ar) = c2 2z 3
(a) show that there is a critical point (i. e . , f" (r) = 0) at a = 1 . (This is a potential local minimum or maximum. )
(b) show that f(ar) is increasing for z > 1 and f(ar) is decreasing for < 1 .
(c) use the frst derivative test for local extrema (see notes or textbook P. 264) and your work in (b) to show that there a local minimum at x = 1.
(d) Based on your work in (b) , is f"(x) positive or negative at x = 1? Is the function concave up or concave down?
(e) LooK again at f(x) = x2 2ar 3. complete the square and write the equation in the vertex form. How does what you know about parabolas compare to your results in parts (a) - (d)?