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Consider expansion of (1+x)^(200)=a(0)+a...

Consider expansion of `(1+x)^(200)=a_(0)+a_(1)x+a_(2)x^(2)+………+a_(200)x^(200)`
Value of `sum_(r=0)^(200) (-1)^(r).(a_(r))/((r+1))` is

A

`100/201`

B

`1/201`

C

`5/201`

D

`0`

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