Tim T.
asked • 04/17/19Calculate the coefficient of x4y18 in the expansion of (x − y)22.
396
7,315
1,584
3,060
More
1 Expert Answer
You can use 22C18 or 22C4 they are both the same
This would be 22!/ (22-18)! x 18! = 22!/(4!)(18!)=7315
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Mark H.
Are those supposed to be exponents??---IOW, are you doing the expansion of (x-y) ^22? I think the composition window allows you to enter superscripts for exponents04/17/19