Evaluate .

Answer and explanation

Correct answer: A.

  1. Step 1: . Step 2. . **Answer: . Why not the others:** : This loses the sign from . : is real, so the result cannot be imaginary. : The fourth power of is real, so it cannot be .

Practise more Sequences and complex numbers.

Free questions with an explanation for every one, and full timed Pancyprian Examinations (Cyprus) mock tests.

All Sequences and complex numbers questionsTake a mock test

More Sequences and complex numbers questions