Let `rth` term of a series be given by `T_r=r/(1-3r^2+r^4)`then `L t_(n->oo)sum_(r=1)^n T_r=`

Let rth term of a series be given by T_(r)=(r)/(1-3r^(2)+r^(4)) then Lt_(n rarr oo)sum_(r=1)^(n)T_(r)=

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 rth term of a series is given by t_(r)=(r)/(1+r^(2)+r_(n)^(4)), then lim(n rarr oo)sum_(r=1)^(n)(t_(r))

Let the rth term t_(r) of a series is given by t_(r)=r/(1+r^(2)+r^(4)) , the value of lim_(ntooo)sum_(r=1)^(n)t_(r) is

Let t_r=2^(r/2)+2^(-r/2) then sum_(r=1)^10 t_r^2=

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

If sum_(r=1)^(n)T_(r)=(n(n+1)(n+2)(n+3))/(12) where T_(r) denotes the rth term of the series. Find lim_(nto oo) sum_(r=1)^(n)(1)/(T_(r)) .

The sum 20 terms of a series whose rth term is given by T_(r)=(-1)^(r)((r^(2)+r+1)/(r!)) is

If sum of x terms of a series is S_(x)=(1)/((2x+3)(2x+1)) whose r^(th) term is T_(r) . Then, sum_(r=1)^(n) (1)/(T_(r)) is equal to