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Grade 12Differential Calculus

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

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Profile image of Irshad Ansari
8 Years agoGrade 12
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1 Answer

Profile image of Arun
8 Years ago
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