solve it for me ...this is factorial type question
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hey there !
=) (n+1)!/2!(n-1)! = (n+1)n(n-1)!/2!(n-1)!
cancel out (n-1)! from numerator and denominator...
we get,
======) (n+1)n/2
so answer is n(n+1)/2 ...
_____________________________
Hope it will help u
=) (n+1)!/2!(n-1)! = (n+1)n(n-1)!/2!(n-1)!
cancel out (n-1)! from numerator and denominator...
we get,
======) (n+1)n/2
so answer is n(n+1)/2 ...
_____________________________
Hope it will help u
Daflu:
great ... it really helps me
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