#### Answer

1

#### Work Step by Step

In the expansion of $(x+y)^9$, the last term contains $y^9$.
The last term in this expansion is:
$\binom{9}{9}x^0y^9$; therefore the coefficient is 1.

Published by
Pearson

ISBN 10:
0-32184-874-8

ISBN 13:
978-0-32184-874-1

1

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