Mathematics

Mathematics

Problem

9. If

\mathrm{A}=\{3,6,9,12,15,18,21\}, \mathrm{B}=\{4,8,12,16,20\}

,

C=\{2,4,6,8,10,12,14,16\}, D=\{5,10,15,20\}

; find (i)

\mathrm{A}-\mathrm{B}

(ii)

\mathrm{A}-\mathrm{C}

(iii)

\mathrm{A}-\mathrm{D}

(iv)

\mathrm{B}-\mathrm{A}

(v)

\mathrm{C}-\mathrm{A}

(vi)

\mathrm{D}-\mathrm{A}

(vii)

\mathrm{B}-\mathrm{C}

(viii)

\mathrm{B}-\mathrm{D}

(ix)

\mathrm{C}-\mathrm{B}

(x)

\mathrm{D}-\mathrm{B}

(xi)

\mathrm{C}-\mathrm{D}

(xii)

\mathrm{D}-\mathrm{C}

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