Answer:
B.
Step-by-step explanation:
If n = 1 , a1 = 9^1^2 +3 = 12
a2 = 9*2^2 + 3 = 39
a3 = 9*3^2 + 3 = 84
The differences are 39 - 12 = 27 and 84 - 39 = 45 so it is not arithmetic as an arithmetic series ad a common difference.
1. B
2. B
x=56
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then cross multiply
4200=75x
