Question

What is the value of the summation `sum_(i=1)^n (2i^2 +i - 8)?`

Answer 1

A.2(n + 1)(2n + 1) + 3(n + 1) − 48

B.`n/6` [2( n + 1)(2 n + 1) + 3( n + 1) − 48]

C.(n + 1)(2n + 1) + `(3(n + 1))/(2)` − 48

D.`(n(2n + 1))/(6)` + `(n(n + 1))/(2)` − 48n