Sigma 11 k=8 (2k-9) (k-7) Adalah

semoga membantu..........

jawab

11
∑  (2k -9)(k - 7)
k = 8

k = 8 → (16-9)(8-7)= 7
k =  9 → (18-9)(9-7) = 18
k= 10 → (20-9)(10-7)= 33
k= 11 → (22-9)(11-7) =  52

11
∑ (2k -9)(k - 7) = 7 +18 + 33 + 52 =  110
k= 8