What is the modulus of the complex number z = 2 + 2i?
Answer and explanation
Correct answer: B. sqrt(8)
- Step 1: The modulus is |z| = sqrt(a^2 + b^2).
- Step 2: |z| = sqrt(4 + 4) = sqrt(8) = sqrt(8).
Answer
sqrt(8).
Why not the others: 4 adds the real and imaginary parts; 8 is the squared modulus; the last value subtracts the squares.
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