Ask your own question, for FREE!
Mathematics 13 Online
OpenStudy (anonymous):

Simplify the following expression: (n − r + 1)! (n − r − 2)!

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!