- Home
- Standard 12
- Mathematics
1.Relation and Function
medium
ગણ $\mathrm{A}=\{1,2,3, \ldots, 13,14\}$ પર વ્યાખ્યાયિત સંબંધ $\mathrm{R}=\{(x, y): 3 x-y=0\}$ સ્વવાચક, સંમિત અથવા પરંપરિત સંબંધ છે કે નહિ તે નક્કી કરો ?
Option A
Option B
Option C
Option D
Solution
$\mathrm{A}=\{1,2,3 \ldots 13,14\}$
$\mathrm{R}=\{(x, y): 3 x-y=0\}$
$\therefore $ $\mathrm{R} =\{(1,3),\,(2,6),\,(3,9),\,(4,12)\}$
$\mathrm{R}$ is not reflexive since $(1,1),(2,2) \ldots(14,\,14) \notin \mathrm{R}$
Also, $\mathrm{R}$ is not symmetric as $(1,3) \in \mathrm{R},$ but $(3,1) \notin \mathrm{R}$ . $[3(3)-1 \neq 0]$
Also, $\mathrm{R}$ is not transitive as $(1,3),\,(3,9) \in \mathrm{R},$ but $(1,9) \notin \mathrm{R}$ . $[3(1)-9 \neq 0]$
Hence, $\mathrm{R}$ is neither reflexive, nor symmetric, nor transitive.
Standard 12
Mathematics
