Maxima and Minima

Find the maximum value of x^{4}-18x^{2} in the interval:

(i) \left[-4,\,4\right]

(ii) \left[-5,\,5\right]

Source: Rosenberg, R.L. (1984). Elementary Calculus: Course Notes. Ottawa, Canada: Holt, Rinehart and Winston. (Exercise 2: Question 10, p. 11)

Author: ascklee

Dr. Lee teaches at the Wee Kim Wee School of Communication and Information at the Nanyang Technological University in Singapore. He founded The Mathematics Digital Library in 2013.

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