Prove that :

$\displaystyle \frac{1}{{\sqrt {3 + 4i} }} + \frac{1}{{\sqrt {3 - 4i} }} = \pm \frac{4}{5}

$

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- Dec 24th 2009, 12:11 AMdhiabComplex -calcul
Prove that :

$\displaystyle \frac{1}{{\sqrt {3 + 4i} }} + \frac{1}{{\sqrt {3 - 4i} }} = \pm \frac{4}{5}

$ - Dec 24th 2009, 12:31 AMmr fantastic
- Dec 24th 2009, 02:06 AMLucio Carvalho
Hello dhiab,

I agree with mr. fantastic, but here it is another way.

I hope you will understand!

Bye! - Dec 24th 2009, 06:57 AMSoroban
Hello, Lucio!

Lovely solution!