Let z be a complex number with |z| = 1 and z ≠±1. (a) [5pts] Show that the complex number z0 = 1+z is purely imaginary. (i.e. z0 = bi 1−z (b) [5pts] Using the similar technique, show that if arg z ≠kπ, (k is an integer) then for some real number b) z1 = 1+z ̄ is also purely imaginary.
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