If A = {1, 2}, which of the following is an element of the power set P(A)?
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Answer and explanation
Correct answer: {1}
The power set P(A) is the set of all subsets of A. For A = {1, 2}, its power set is P(A) = {∅, {1}, {2}, {1, 2}}. Therefore {1} is an element of P(A), because it is a subset of A. The number 3, the set {3}, and the set {1, 3} are not included because 3 is not an element of A.
Frequently asked questions
What is the correct answer to this question?
{1}
Why is this the correct answer?
The power set P(A) is the set of all subsets of A. For A = {1, 2}, its power set is P(A) = {∅, {1}, {2}, {1, 2}}. Therefore {1} is an element of P(A), because it is a subset of A. The number 3, the set {3}, and the set {1, 3} are not included because 3 is not an element of A.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Sets. Topic: Power Set and Subsets.
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