Multivariable Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 0-53849-787-4
ISBN 13: 978-0-53849-787-9

Appendix G - Exercises - Page A12: 8

Answer

$-\frac{5}{17}+\frac{14}{17}i$

Work Step by Step

Given: $\displaystyle \frac{3+2i}{1-4i}$ Multiply the numerator and denominator by the conjugate of the denominator: $=\frac{3+2i}{1-4i}\times\frac{1+4i}{1+4i}$ Since, $i^2=-1$ and $i=\sqrt{-1}$ Thus, $=\frac{3+12i+2i+8(-1)}{1^{2}+4^{2}}$ $=\frac{-5+14i}{17}$ $=-\frac{5}{17}+\frac{14}{17}i$
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