" If "t_(r)=(r)/(4r^(4)+1)," then "sum_(r=1)^(oo)t_(r)" is equal to "

If T_(r)=r(r^(2)-1), then find sum_(r=2)^(oo)(1)/(T)

let the rth term of the series is given by tr=(r)/(1+r^(2)+r^(4)) then lim_(n rarr oo)sum_(r=1)^(n)t_(r) is equal to: ( A) (1)/(2)(B)1(C)2(D)(1)/(4)

The value of sum_(r=1)^(oo)(r)/(3^r) is equal to:

If sum_(r=1)^(oo)(1)/((2r-1)^(2))=(pi^(2))/(8) , then sum_(r=1)^(oo) (1)/(r^(2)) is equal to

The sum sum_(r=2)^(oo)(1)/(r^(2)-1) is equal to

If T_r=r(r^2-1), then find sum_(r=2)^oo1/T_rdot

If S_(n)=sum_(r=1)^(n)t_(r)=(1)/(6)n(2n^(2)+9n+13), then sum_(r=1)^(oo)(1)/(r*sqrt(t)) equals

If T_r=r(r^2-1), then find sum_(r=2)^oo1/Tdot

If T_r=r(r^2-1), then find sum_(r=2)^oo1/Tdot