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Write as sum of real and imaginary part

  1. Apr 21, 2008 #1

    I have to write the 1/(a+ib) as a sum of a real part and an imaginary part.

    I was thinking of using the complex conjugate (a-ib) and multiply with this

    (a-ib) / (a^2 + b^2)

    I am a little bit lost on what to do next - any help appreciated thanks in advance

  2. jcsd
  3. Apr 21, 2008 #2

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    Do you know how to write (x+y)/z as the sum of two fractions?
  4. Apr 21, 2008 #3


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    Hi greisen! :smile:

    You've done it!

    That is the solution! :smile:
  5. Apr 21, 2008 #4

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    Not for a student who is just learning complex numbers. He won't get full marks if he leaves it at that.
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