What is the coefficient of x^7 in the expansion of ((1-x)^4) * ((1+x) ^9)?

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What is the coefficient of x^7 in the expansion of ((1-x)^4) * ((1+x) ^9)?

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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Posted Date: May 26, 2020 10:44 AM

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What is the coefficient of x^7 in the expansion of ((1-x)^4) * ((1+x) ^9)?

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Precalculus

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