Given:
[tex]\begin{gathered} R=\mleft\lbrace-1,1,3,5\mright\rbrace \\ S=\mleft\lbrace-3,1,3\mright\rbrace \end{gathered}[/tex]
To find:
[tex]R\cup S[/tex]
The union of two sets R and S is,
[tex]\begin{gathered} R\cup S=\mleft\lbrace-1,1,3,5\mright\rbrace\cup\mleft\lbrace-3,1,3\mright\rbrace \\ =\mleft\lbrace-3,-1,1,3,5\mright\rbrace \end{gathered}[/tex]
Hence, the answer is,
[tex]\lbrace-3,-1,1,3,5\rbrace[/tex]
