If a =2 +i then in the form of a+bi what does a^-1 equal

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- Oct 23rd 2006, 04:38 PMRimasNeed Help, complex
If a =2 +i then in the form of a+bi what does a^-1 equal

- Oct 23rd 2006, 04:59 PMThePerfectHacker
- Oct 24th 2006, 02:45 PMRimas
What?

- Oct 24th 2006, 04:27 PMThePerfectHacker
- Oct 24th 2006, 04:36 PMPlato
This is one of my favorite questions.

The multiplicative inverse of a complex number z is:

$\displaystyle z^{ - 1} = \frac{{\overline z }}{{\left| z \right|^2 }}.$

Of course $\displaystyle z\not = 0+0i$