مقدار a و b را چنان تعیین کنید که تابع زیر در x=2 پیوسته باشد.
$f(x) = \left\{ \begin{gathered}
2x + a\,\,\,\,\,\,\,\,\,\,\,\,x \gt 2 \hfill \\
3\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = 2 \hfill \\
bx + 1\,\,\,\,\,\,\,\,\,\,\,\,\,\,x \lt 2 \hfill \\
\end{gathered} \right.$