Answer:
70
Step-by-step explanation:
n =2 ; 3n + 2 = 3*2 + 2 = 6 + 2 = 8
n = 3 ; 3n + 2 = 3*3 + 2 = 9 + 2 = 11
n =4 ; 3n+ 2 = 3*4 + 2 = 12 + 2 = 14
n= 5; 3n +2 = 3*5 + 2 = 15 + 2 = 17
n = 6; 3n + 2 = 3*6 + 2 = 18 + 2 = 20
∑ (3n + 2) = 8 + 11 + 14 + 17 + 20 = 70
