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31. Let z=a+i+a−i1​, where a is a real number. Which of the following must be true? I. z is a real number. II. If z is a

Posted: Wed Jul 13, 2022 5:08 am
by answerhappygod
31 Let Z A I A I1 Where A Is A Real Number Which Of The Following Must Be True I Z Is A Real Number Ii If Z Is A 1
31 Let Z A I A I1 Where A Is A Real Number Which Of The Following Must Be True I Z Is A Real Number Ii If Z Is A 1 (15.4 KiB) Viewed 33 times
31. Let z=a+i+a−i1​, where a is a real number. Which of the following must be true? I. z is a real number. II. If z is a purely imaginary number, then z=2i. III.  Imaginary part of z Real part of z​ is an irrational number. A. I only B. II only C. I and III only D. II and III only