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Express the following in the form of $\;a+bi : (-5i) \; (\large\frac{1}{8}i)$

$(a)\;\large\frac{1}{8} + 0 i\qquad(b)\;\large\frac{3}{8} + 2 i \qquad(c)\;\large\frac{5}{8} + 0 i \qquad(d)\;\large\frac{5}{3} + 3 i$

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Answer : $\;\large\frac{5}{8} + 0 i $
Explanation :
$(-5i) \; (\large\frac{1}{8}i) = \large\frac{5}{8}\;i^{2}$
$= - \large\frac{5}{8} + 0 i \quad [i^{2} =-1]$
answered Apr 16, 2014 by yamini.v
edited Apr 16, 2014 by yamini.v
 

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