sum_(r=1)^(n)(1)/(log_(2)r4)" is equal to "

sum_(r=1)^(n) 1/(log_(2^(r))4) is equal to

sum_(r=1)^(n) 1/(log_(2^(r))4) is equal to

If I(r)=r(r^(2)-1), then sum_(r=2)^(n)(1)/(I(r)) is equal to

If sum_(r=1)^(n)T_(r)=(n(n+1)(n+2)(n+3))/(12) then 4(lim_(x rarr oo)sum_(x-1)^(n)(1)/(T_(r))) is equal to

The valueof sum_(r=1)^(n)r^(4)-sum_(r=1)^(n+2)(n+1-r)^(4) is equal to

sum_(r= 2)^(43) (1)/(log_(r)n) =

Let sum_(r=1)^(n)r^(4)=f(n)," then " sum_(r=1)^(n) (2r-1)^(4) is equal to

Let sum_(r=1)^(n)(r^(4))=f(n). Then sum_(r=1)^(n)(2r-1)^(4) is equal to :

sum_(r=1)^(n)(C(n,r))/(r+2) is equal to

If S_(r)= sum_(r=1)^(n)T_(1)=n(n+1)(n+2)(n+3) then sum_(r=1)^(10) 1/(T_(r)) is equal to