Is $\lim\limits_{z\to\infty} \frac{4z^2}{(z-1)^2}$, $z\in\mathbb{C}$, evaluated the same way as a real variable function limit? Or does one need to show separate cases for $x\to\infty$ and $y\to\infty$ in $z:=x+iy$? Got confused.
2026-04-04 13:15:15.1775308515
Complex variable limit at infinity
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