[" If "Sigma n=210" ,then "Sigma n^(2)=],[[" (a) "2870," (b) "2160," (c) "2970]]

For all n in N, Sigma n

For all n in N, Sigma n

"Evaluate "Sigma_(n=1)^(6) (3+2^(n)).

"Evaluate "Sigma_(n=1)^(6) (3+2^(n)).

If Sigma_(r=1)^(n) r^4=I(n), " then "Sigma__(r=1)^(n) (2r -1)^4 is equal to

If Sigma_(r=1)^(n) r^4=I(n), " then "Sigma__(r=1)^(n) (2r -1)^4 is equal to

From the following data find regression equation of y on x, Sigma x= 55, Sigma y= 88, Sigma x^(2)= 385, Sigma y^(2) = 1114, Sigma xy= 586,n= 10

Let a_n be the n^(th) term, of a G.P of postive terms. If Sigma_(n=1)^(100)a_(2n+1)= 200 and Sigma_(n=1)^(100)a_(2n)=100, " then" Sigma_(n=1)^(200)a_(n)

Sigma_(n=1)^(5)sin ^(-1) ( sin ( 2n -1)) is

"Evaluate Sigma_(n=1)^(11) (2+3^(n))