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Sets of Real Numbers - Questions

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Question 1
17559

If \(A = \left\{ {1,2,3,4,5,6,7} \right\}\) and \(B = \left\{ {2,3,5,7} \right\}\) then \(A\backslash B = ?\)

\(\left\{ {1,4,6} \right\}\)

If \(A \backslash B\) then in \(A=\{1,2,3,4,5,6,7\}\) exclude all elements that are in \(B\).
\(\therefore A \backslash B=\{1,4,6\}\)

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