Question

Σ (2+k^2) where k=-1 and N=27

Answer 1

(2+(-1)²)+(2+(0)²)+(2+(1)²)+(2+(2)²)+...+(2+(27)²) = 6989

Answer 2

can you show the formula not the extended ? and explain how to shift?

Answer 3

its like Σ [2+(k+1)^2 where k=1 and n=29

Answer 4

i undertstand the that you use n(n+1)(2n+1)\6 but im lost with the shifting the index where does it come into play with the formula?

Answer 5

one sec

Answer 6

:)

Answer 7

THank you so much

Answer 8

i'm glad it helped

Answer 9

oops i made a mistake on that first part one sec

Answer 10

yea i just caught it