Absolute maxima and minima a. Find the

Chapter 7, Problem 37E

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QUESTION:

31–42. Absolute maxima and minima

a. Find the critical points of f on the given interval.

b. Determine the absolute extreme values of f on the given interval.

c. Use a graphing utility to confirm your conclusions

\(f(x)=(2 x)^{x}\) on [0.1, 1]

Questions & Answers

QUESTION:

31–42. Absolute maxima and minima

a. Find the critical points of f on the given interval.

b. Determine the absolute extreme values of f on the given interval.

c. Use a graphing utility to confirm your conclusions

\(f(x)=(2 x)^{x}\) on [0.1, 1]

ANSWER:

STEP_BY_STEP SOLUTION Step-1 Let f be a continuous function defined on an open interval containing a number ‘c’.The number ‘c’ is critical value ( or critical number ). If f (c) = 0 1 or f (c) is undefined. A critical point on that graph of f has the form (c,f(c)). Step-2 When an output value of a function is a maximum or a minimum over the entire domain of the function, the value is called the absolute maximum or the absolute minimum. Let be a funct ion withdomain D and let c be afixed constant in D . Then he output value f (c) is the 1. Absolute maximum value of f on D if and only if f(x) f(c) , for all x in D. 2. Absolute minimum value of f on D if and only if f(c) f(x) , for all x in D. Step_3 a). The given function is f(x) = (2x) , on [0.1,1]. Clearly the function is a exponential function and it is continuous for all of x . Now , we have to find out the critical points of f on the given interval. x Now , f(

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