Use the summation notation to rewrite the following expression (in Description below).

Question

(1³ − 7) − (2³ − 7) + (3³ − 7) − (4³ − 7) + (5³ − 7) − (6³ − 7)

Answer 1

SUM [ (-1)^(N-1) * ( N^2 - 7) ], N=1,2,3,....,6