MCQ
If A and B are two sets then $A \cap( A \cup B )$ is :
- ✓$A$
- B$\phi$
- C$B$
- DNone of these
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If $\text{f(z)}=\frac{7-\text{z}}{1-\text{z}^2},$ where z = 1 + 2i, then |f(z)| is:
$\frac{|\text{z}|}{2}$
$|\text{z}|$
$2|\text{z}|$
None of these