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If `X=" "{a ," "b ," "c ," "d}`and `Y=" "{f," "b ," "d ," "g}`, find(i) `X" "" "Y`(ii)`Y" "" "X`(iii)`X nnY` |
Answer» `X={a,b,c,d}and Y={f,b,d,g}` (i) `X-Y={x:x in X " but "x cancel(in)Y}` `={a,c}` Therefore, `X-Y = {a,c}` (ii) `X = {a,b,c,d} and Y={f,b,d,g}` `Y - X={x:x in Y " but "x cancel(in) X}` `={f,g}` Therefore, `Y-X={f,g}` (iii) `X={a,b,c,d}and Y={f,b,d,g}` `X capY={x:x in X and X in Y}` `={b,d}` Therefore, `X cap Y = {b,d}`. |
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