Mathematics, 31.01.2020 05:04, Thejollyhellhound20
What is the coefficient of the term x7y in the expansion of (x + y)8?
Answers: 2
![\left[\begin{array}{ccc}n\\z\end{array}\right] = \frac{n!}{z!(n-z)!}](/tpl/images/0488/5919/34c1e.png)
![\left[\begin{array}{ccc}8\\1\end{array}\right] = \frac{8!}{1!(8-1)!}](/tpl/images/0488/5919/c867b.png)
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What is the coefficient of the term x7y in the expansion of (x + y)8?...
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