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 Let R be the set of real numbers.Statement-1: A = {(x, y) ∈ R × R : y – x is an integer} is an equivalence relation on R.
Statement-2: B = {(x, y) ∈ R ×  R : x = ay for some rational number a} is an equivalence relation on R. [2011]
  • a)
    Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1.
  • b)
    Statement-1 is true, Statement-2 is false.
  • c)
    Statement-1 is false, Statement-2 is true.
  • d)
    Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1.
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Let R be the set of real numbers.Statement-1: A = {(x, y) ∈ R &ti...
x – y is an integer.
∵  x – x = 0 is an integer ⇒ A is reflexive.
Let x – y is an integer ⇒  y – x is an integer
⇒  A is symmetric Let x – y, y – z are integers
⇒  x – y + y – z is also an integer
⇒  x – z is an integer ⇒  A is transitive
∴  A is an equivalence relation.
Hence statement 1 is true.
Also B can be considered as
xBy if a rational number
is a rational number
But    a rational number need not imply   a rational number because
is rational ⇒   is not rational
∴  B is not an equivalence relation.
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Let R be the set of real numbers.Statement-1: A = {(x, y) ∈ R × R : y – x is an integer} is an equivalence relation on R.Statement-2: B = {(x, y) ∈ R × R : x = ay for some rational number a} is an equivalence relation on R. [2011]a)Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1.b)Statement-1 is true, Statement-2 is false.c)Statement-1 is false, Statement-2 is true.d)Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1.Correct answer is option 'B'. Can you explain this answer?
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Let R be the set of real numbers.Statement-1: A = {(x, y) ∈ R × R : y – x is an integer} is an equivalence relation on R.Statement-2: B = {(x, y) ∈ R × R : x = ay for some rational number a} is an equivalence relation on R. [2011]a)Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1.b)Statement-1 is true, Statement-2 is false.c)Statement-1 is false, Statement-2 is true.d)Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1.Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Let R be the set of real numbers.Statement-1: A = {(x, y) ∈ R × R : y – x is an integer} is an equivalence relation on R.Statement-2: B = {(x, y) ∈ R × R : x = ay for some rational number a} is an equivalence relation on R. [2011]a)Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1.b)Statement-1 is true, Statement-2 is false.c)Statement-1 is false, Statement-2 is true.d)Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Let R be the set of real numbers.Statement-1: A = {(x, y) ∈ R × R : y – x is an integer} is an equivalence relation on R.Statement-2: B = {(x, y) ∈ R × R : x = ay for some rational number a} is an equivalence relation on R. [2011]a)Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1.b)Statement-1 is true, Statement-2 is false.c)Statement-1 is false, Statement-2 is true.d)Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1.Correct answer is option 'B'. Can you explain this answer?.
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