<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\documentclass[a4paper,12pt]{article}
\usepackage{epsfig}
\newcommand\ds{\displaystyle}
\begin{document}

\parindent=0pt

QUESTION

Show on an Argand diagram the locus of the point $z$ which
satisfies the equation $|z-j|=1$.

\bigskip

ANSWER

\begin{center}
\epsfig{file=17x-2000-1.eps, width=40mm}
\end{center}


$|z-j|=1$ represents a circle radius 1 centre $j$.





\end{document}
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