Find the sum

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Find the sum

by jayavignesh » Sat Oct 15, 2011 3:28 am
S=((4*1)/((4*1^4)+1))+((4*2)/((4*2^4)+1))+((4*3)/((4*3^4)+1))+.........+((4*10)/((4*10^4)+1))
a.(121/100)
b.(121/221)
a.(100/121)
a.(220/221)