Find the slope of the tangent line to the parametric curve
{
x
=
t
4
+
2
t
y
=
t
2
+
4
t
\displaystyle {\left\lbrace\begin{array}{c} {x}={t}^{{4}}+{2}{t}\\{y}={t}^{{2}}+{4}{t}\end{array}\right.}
{
x
=
t
4
+
2
t
y
=
t
2
+
4
t
at the point
t
=
4
\displaystyle {t}={4}
t
=
4
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