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Find the constant term in the expansion of (2z1z)9
 

 

Check out this problem! I was doing homework, and this was one of the problems!

 

The solution was pretty cool. also, do not scroll down if you don't want to see the answer. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWER: 

formula:

(9k)(2z)9k(1z)k=(9k)(1)k29kz9kzk/2.

Answer:

(96)(1)6296=672

 
 Dec 7, 2022

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