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Prove (using combinatorics) that the binomial coefficent 126 belongs to the term a4b5 in the expansion (a + b)^9. Show a

Posted: Wed May 11, 2022 12:45 pm
by answerhappygod
Prove (using combinatorics) that the binomial coefficent 126
belongs to the term
a4b5 in the expansion (a + b)^9. Show all your
work to get credit.