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Consider the sets:U = {1, 2, {1}, {2}, {1, 2}}     A = {1, 2, {1}}      B = {{1}, {1, 2}}     C = {2, {1}, {2}}B + C is the set:a.{{1, 2}}b.{{1}, {2}}c.{2, {2}, {1, 2}}d.{2, {1}, {2}, {1, 2}}

Question

Consider the sets:U = {1, 2, {1}, {2}, {1, 2}}     A = {1, 2, {1}}      B = {{1}, {1, 2}}     C = {2, {1}, {2}}B + C is the set:a.{{1, 2}}b.{{1}, {2}}c.{2, {2}, {1, 2}}d.{2, {1}, {2}, {1, 2}}

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Solution

The operation "+" in set theory usually refers to the union of two sets. The union of two sets is the set of elements which are in either set, or in both.

So, B + C (or B union C) would be a set that contains all the elements of B and all the elements of C.

B = {{1}, {1, 2}} C = {2, {1}, {2}}

The union of B and C would be: {{1}, {1, 2}, 2, {1}, {2}}

However, none of the options provided (a, b, c, d) match this result. There might be a mistake in the question or the provided options.

This problem has been solved

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