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The usual method of Q1. is to multiply each fraction by the conjugate of the denominator in order to give it a real denominator... but can you please show me one solution so that I make sure?
For 2. To use the fact that i^2n = -1
For 3, To show that the distances between each point on the complex plane are equal.. but how?
On Q4, No idea
Q5 No idea
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