Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Mathematics Complex Numbers

The true statement is 

1
|z1 + z2|2 < |z1|2 + |z2|2 + 2R(z1\({{\rm{\overline z}}_2}\))
2
|z1 - z2|2 > |z1|2 + |z2|2 - 2R(z1\({{\rm{\overline z}}_2}\))
3
|z1 + z2|2 + |z1 - z2|2 = 2(|z1|2 + |z2|2)
4
|z1| + |z2| < |z1 + z2|
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