Mathematics

Problem

4. If

A=\{1,2,3,4\}, B=\{3,4,5,6\}, C=\{5,6,7,8\}

and

D=\{7,8,9,10\}

; find (i)

\mathrm{A} \cup \mathrm{B}

(ii)

\mathrm{A} \cup \mathrm{C}

(iii)

\mathrm{B} \cup \mathrm{C}

(iv)

\mathrm{B} \cup \mathrm{D}

(v)

\mathrm{A} \cup \mathrm{B} \cup \mathrm{C}

(vi)

\mathrm{A} \cup \mathrm{B} \cup \mathrm{D}

(vii)

\mathrm{B} \cup \mathrm{C} \cup \mathrm{D}