Sigma Percentile
JEE Main 2019 (9 January)
LEVELJEE Main

Animated Solution for Mathematics - Sets and Relations: If the Boolean expression is equivalent to , where , then the ordered pair is:

Select Answer:

Visualized Solution

Understanding the Boolean Expression

  • Given expression:
  • Target equivalence:
  • Unknown operators:

Identifying the Target Region

  • Target:
  • This represents the intersection of sets and .

Testing Option A:

  • Let's test the first pair: and
  • Substitute into the expression:

Applying the Distributive Law

  • Apply Distributive Law to :

Simplifying the First Term

  • First term:
  • Rearrange using Associative Law:
  • Since (False):

Simplifying the Second Term

  • Second term:
  • Rearrange:
  • Using Idempotent Law ():
  • Result:

Combining the Results

  • Combine the simplified terms:
  • Using Identity Law ():
  • Final result:
  • This matches our target!

Verifying Option B:

  • Let's verify other options to be sure.
  • Substitute and :

Simplifying Option B

  • Apply Distributive Law (in reverse):
  • Since :
  • (Incorrect)

Verifying Option C:

  • Substitute and :

Simplifying Option C

  • Rearrange terms:
  • Substitute known identities:
  • (Incorrect)

Verifying Option D:

  • Substitute and :

Simplifying Option D

  • Distribute over :
  • (Incorrect)

Final Conclusion

  • Only simplifies to .
  • Therefore, the correct ordered pair is .
  • Correct Option: (A)

The Sigma Insight: Types of Sets and Set Operations

Solution Diagram

Analyzing the Setup

We are tasked with finding the Boolean operators and such that the expression is logically equivalent to the intersection .
The target expression represents the region where both and are true. Our objective is to identify the specific operators that reduce the given compound statement to this intersection.

Testing the Hypothesis

Let us test the candidate operators: and . Substituting these into the original expression, we obtain:
To simplify this, we apply the Distributive Law. We distribute the term over the disjunction as follows:

The Surgical Simplification

We now evaluate the two resulting terms independently to determine their truth values.
The First Term: . By applying the Associative Law, we rearrange this to . Since is a contradiction (always False), the entire term simplifies to , which is .
The Second Term: . Using the Associative Law, we rewrite this as . By the Idempotent Law, simplifies to , leaving us with .

Final Calculation

Combining these results, the expression becomes .
By the Identity Law, the disjunction of False with any expression is the expression itself. Thus, the entire statement simplifies to:
This matches our target perfectly. We have confirmed that the ordered pair is the correct solution.

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