(n-r+1) n!/(n-r+1)!=n!/(n-r)!
Answers
Answered by
2
LHS
=(n-r+1)n!/(n-r+1)!
=(n-r+1)n!/(n-r+1)(n-r)!
=n!/(n-r)!
=RHS
PROVED
=(n-r+1)n!/(n-r+1)!
=(n-r+1)n!/(n-r+1)(n-r)!
=n!/(n-r)!
=RHS
PROVED
Answered by
3
(n-r+1)n!/(n-r+1)!
Both (n-r+1)! will be cancelled
so the remaining is n!
WE KNOW THAT, n! =n!/(n-r)!
so
n!/(n-r)!=n!/(n-r)!
L.H.S =R.H.S
HENCE PROVED
THANK YOU!!
Both (n-r+1)! will be cancelled
so the remaining is n!
WE KNOW THAT, n! =n!/(n-r)!
so
n!/(n-r)!=n!/(n-r)!
L.H.S =R.H.S
HENCE PROVED
THANK YOU!!
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