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OpenStudy (anonymous):
Let D={6,9,11} E={6,8,9,10} and F={5,7,8,9,11} List the elements of D∪E.
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OpenStudy (anonymous):
is it {6,8,9,10,11}?
OpenStudy (btaylor):
\[D \cup E =\left\{ 6,8,9,10,11 \right\}\]
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