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Grade: 12 

                        
Please explain the last step.. How it came to (n+1)/2 ??
3 years ago

Answers : (1)

Arun
24742 Points 
							
It is written like this
3/2 * 4/3 * 5/4*...............* n/(n-1)* (n+1)/n 
We see that 
All the terms are cancelled out except 2 in denominator and (n+1) in numerator
Hence
(n+1)/2 is remained
3 years ago
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