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Show that the relation R in R defined as R = {(a, b): a ≤ b}, is...

Show that the relation R in R defined as | Class 12 Mathematics Chapter Relations and Functions, Relations and Functions NCERT Solutions

Question: Show that the relation R in R defined as R = {(a, b): a ≤ b}, is reflexive and transitive but not symmetric.

Answer:

R = {(a, b); a ≤ b}

Clearly (a, a) ∈ R as a = a.

∴R is reflexive.

Now,

(2, 4) ∈ R (as 2 < 4)

But, (4, 2) ∉ R as 4 is greater than 2.

∴ R is not symmetric.

Now, let (a, b), (b, c) ∈ R.

Then,

a ≤ b and b ≤ c

⇒ a ≤ c

⇒ (a, c) ∈ R

∴R is transitive.

Hence,R is reflexive and transitive but not symmetric.

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Popular questions of class 12 Mathematics

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Welcome to the NCERT Solutions for Class 12 Mathematics - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 4: Show that the relation R in R defined as R = {(a, b): a ≤ b}, is reflexive and transitive but ....

Show that the relation R in R defined as | Class 12 Mathematics Chapter Relations and Functions, Relations and Functions NCERT Solutions

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