Hi, this seems like the right section to post, I have a few questions, three fractions that I know the answer for but I just cant figure out how they were arrived at (the middle step).(adsbygoogle = window.adsbygoogle || []).push({});

The only way I can think of solving them is expanding it all out etc. which would result in a 100 term cubic polynomial, so I'm sure there is an easier way to get to the final fraction.

If anyone can help me solve either of these three that would be great.

Please see the pictures for the questions.

P.S the 'j' is 'i', that is the square root of -1.

Thanks

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# Fractional Reduction TROUBLE

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