If A = {3, 6, 9, 12, 15, 18, 21}, B = {4, 8, | vedclass

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(B) The difference of two sets $D$ and $C$,denoted by $D - C$,is the set of elements which belong to $D$ but do not belong to $C$.Given $D = \{5, 10,

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$\{5, 15, 20\}$

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(B) The difference of two sets $D$ and $C$,denoted by $D - C$,is the set of elements which belong to $D$ but do not belong to $C$.Given $D = \{5, 10, 15, 20\}$ and $C = \{2, 4, 6, 8, 10, 12, 14, 16\}$.We identify elements in $D$ that are also in $C$: the element $10$ is present in both sets.Removing $10$ from set $D$,we get $D - C = \{5, 15, 20\}$.

If $A = \{3, 6, 9, 12, 15, 18, 21\}, B = \{4, 8, 12, 16, 20\}, C = \{2, 4, 6, 8, 10, 12, 14, 16\}, D = \{5, 10, 15, 20\};$ find $D - C$.

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