- Choice C$$N(4)=\frac{1200\times4^{2}+10}{4^{2}+1}$$ $$=\frac{1200\times16+10}{16+1}$$ $$=\frac{19200}{17}$$ $$\approx 1130$$
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- Choice C$$N(4)=\frac{1200\times4^{2}+10}{4^{2}+1}$$ $$=\frac{1200\times16+10}{16+1}$$ $$=\frac{19200}{17}$$ $$\approx 1130$$
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