B because nth stand for negative so you need to find the negative value
➷ Substitute 3 into it
20 - (3)^2 = 11
The third term is 11
For the second part, think about which value squared gives a value larger than 20
It would be 5
20 - (5)^2 = -5
➶ Hope This Helps You
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➶ Have A Great Day ^-^
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