Question: (a) Let n = a + ib be a complex number, where a and b arc real (positive or negative) numbers. Show that the product

(a) Let n = a + ib be a complex number, where a and b arc real (positive or negative) numbers. Show that the product nn* is always a positive real number.
(b) Let m = c + id be another complex number. Show that |nm| = |n| |m|.

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