A conic section is a curve obtained by intersecting a cone with a plane.
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\section*Introduction
A function $f(x)$ is a relation between a set of inputs (called the domain) and a set of possible outputs (called the range). A conic section is a curve obtained by
The limit of a function $f(x)$ as $x$ approaches $a$ is denoted by $\lim_x\to a f(x)$. A conic section is a curve obtained by