Determine the value of \( k \) for which the following function is continuous at \( x=3 \).
\[f(... VIDEO
Determine the value of \( k \) for which the following function is continuous at \( x=3 \).
\[f(x)=\left\{\begin{array}{cc}\frac{(x+3)^{2}-36}{x-3}, & x \neq 3 \\k & , x=3\end{array}\right.\]
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