Differential Equations and Linear Algebra (4th Edition)

Published by Pearson
ISBN 10: 0-32196-467-5
ISBN 13: 978-0-32196-467-0

Appendix A - Review of Complex Numbers - Exercises for A - Problems - Page 795: 4


$\overline{z}=7-i$ and $|z|=\sqrt{50}$.

Work Step by Step

Of a complex number $z=a+bi$, $\overline{z}=a-bi$ and $|z|=\sqrt{a^2+b^2}$ Hence here, $\overline{z}=7-i$ and $|z|=\sqrt{7^2+1^2}=\sqrt{50}$.
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