Question

Please help I am stuck on this question!

Answer 1

B because nth stand for negative so you need to find the negative value

Answer 2

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➷ 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

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