Question

3 - sequences and iteration
rka calloway
multiple - choice question
what is wrong with the formulae that he has written down?
we dont know what x₂, x₃ etc are.
he has not drawn the square root sign over the +4
7(x₁) could mean 77, not 7 x 7.

Explanation:

The iterative formula $x_{n + 1}=\sqrt{7(x_n)+4}$ should have the square - root sign over the entire expression $7(x_n)+4$. But in the written - down formulas, the square - root sign only covers $7(x_n)$.

Answer:

He has not drawn the square root sign over the +4