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Thread: a + bi form?

  1. July 21st 2009, 07:36 AM #1
    jonyboy5
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    a + bi form?

    how would you do that for "i" and "1-3i"

    it says to find the recepricol of each and put it in a + bi form
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  2. July 21st 2009, 08:11 AM #2
    red_dog
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    \frac{1}{i}=\frac{-i}{-i^2}=-i

    \frac{1}{1-3i}=\frac{1+3i}{(1-3i)(1+3i)}=\frac{1+3i}{10}=\frac{1}{10}+\frac{3}{1 0}i
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