Answer:
45
Step-by-step explanation:
Since this is only three terms
Find the three terms and add
j=1 3(1)^2+1 = 3+1 =4
j=2 3(2)^2+1 = 3(4)+1 =13
j=3 3(9)^2+1 = 27+1 =28
The sum is 4+13+28 =45
1. 400 ÷ 4 = 100
2. 320 ÷ 4 = 80
3. 360 ÷ 9 = 40
4. 5000 ÷ 5 = 1000
5. 3000 ÷ 5 = 600
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