MCQ
A relation $\phi$ from C to R is defined by $\text{x }\phi\text{ y}\Leftrightarrow|\text{x}|=\text{y}.$ Which one is correct?
- A$(2+3\text{i})\ \phi\ 13$
- B$3\phi\ (-3)$
- C$(1+\text{i})\ \phi\ 2$
- D$\text{i}\ \phi\ 1$
Solution:
We have,
$|\text{i}|=\sqrt{1^2+0^2}=1$
Thus, $\text{i }\phi\ 1$ satisfies $\text{x}\ \phi\text{ y}\Leftrightarrow|\text{x}|=\text{y}$
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