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If A={1,2,3} B={3,5,6} C={3,4,7}. Find (...

If A={1,2,3} B={3,5,6} C={3,4,7}. Find (i) `A-(B cup C)` (ii) `B triangle C` (iii) `A triangleB`

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The correct Answer is:
(i) {1,2} (ii) {4,5,6,7} (iii) {1,2,5,6}
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