Materi Notasi Sigma (Baret) Jawab lengkap disertai cara/penjelasan.

NOtasi SIgma
n............n - a
∑ f(x)  =  ∑ f(x + a)
x= 1........1

..
30..............15
∑ (n²+1) =  ∑ 2n² + 30n + 227
n =1...........n= 1
.