Question

STUCK ON THIS :(
What is the value of the summation ∑i=1n(2i2+i−8)?

Answer 1

a 2(n + 1)(2n + 1) + 3(n + 1) − 48
B n6 [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