Home › CBSE Class 11 › mathematics › Complex Numbers — Algebra, Powers of i, Modulus, Conjugate, Multiplicative Inverse, Argand Plane › The modulus |3 + i| equals:
The modulus |3 + i| equals:
A3
B√10
C4
D√3
Answer & Solution
Correct answer: B. √10
|z| = √(a² + b²) for z = a + ib. So |3 + i| = √(3² + 1²) = √10.
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