Use the binomial theorem to find the coefficient of x^1000y^1020 in the expansion of (2x - 3y)^2020

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section: Chapter Questions
Problem 45RE: Use the Binomial Theorem to write the first three terms of (2a+b)17.
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Use the binomial theorem to find the coefficient of x^1000y^1020 in the expansion of (2x - 3y)^2020.   
First response was handwritten and not able to distinguish x from n from r. Thank you!!!

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