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Slide29 - Supplem entaiy Mathematics Complex numbers...

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Unformatted text preview: Supplem entaiy Mathematics: Complex numbers °Solutions of algebraic equations are not always real numbers e. g. x 2: -l . “Ne define the square root of —l as 1". So, i 2 = —1. 0A number containing 1' is called a complex number e. g. z=x+iy °Here the numberx is called the real part of z and y is called the imaginary part. x = Re (2), y = 1111 (Z) °Eve1ypowerof 1' is one of the numbers 1', -z', 1, -l ...
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