GRE
The length of the semicircle PQ
The sum of lengths of line segments PD, DC and CQ
$$k+\frac{1}{k^{2}}$$
$$k^{2}$$+$$\frac{1}{k^{3}}$$
$$m$$
$$n$$
The ratio of the area of triangle ABD to the area of the triangle ABC
$$\frac{3}{4}$$
$$2^{(3^{3})}$$
$$(2^{3})^{(2^{3})}$$
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