Question:
If z is a complex number, then
(a) $|z|^{2}>|z|^{2}$
(b) $|z|^{2}=|z|^{2}$
(c) $|z|^{2}<|z|^{2}$
(d) $|z|^{2} \geq|z|^{2}$
Solution:
It is obvious that, for any complex number z,
$|z|^{2}=|z|^{2}$
Hence, the correct option is (b).
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