Power Series

Find the coefficient of x^{8} in the expansion of \cos^{3}{x} as a power series in x.

Source: Porter, R.I. (1963). Further Elementary Analysis (2nd ed.). London: G. Bell & Sons. (Chapter III Miscellaneous Examples, Question 3, p. 48)

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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