Question: Explain why each function $f(z)$ is continuous at $z_0$, then evaluate $lim_{z to z_0} f(z)$.$f(z)=|3z^2-5|,quad z_0=2+i$

Explain why each function $f(z)$ is continuous at $z_0$, then evaluate $\lim_{z \to z_0} f(z)$.$f(z)=|3z^2-5|,\quad z_0=2+i$

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