$$\frac{1}{1}+\frac{2}{4}+\frac{4}{16}+\frac{8}{64}; \underline{1=4}$$
$\frac{9}{2}=4.5$
$$\frac{1+2}{1}+1+\frac{8}{16}$$
$$\frac{3}{1}+1+\frac{8}{16}$$
$$3+1+\frac{8}{16}$$
$$4+\frac{8}{16}$$
$$4+\frac{1}{2}$$
$$\frac{8}{2}+\frac{1}{2}$$
$$\frac{8+1}{2}$$
$$\frac{9}{2}$$
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$\frac{3 ^ {2}}{2} = 4\frac{1}{2} = 4.5$
