I am not understanding this question:if A={5,7,9,11},B={9,10} let a R b means a<b.a belongs to A ,(a,b) belongs to R,b belongs to b .Then

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Solution

We have a set A={5,7,9,11}
Another set B={9,10}
Now, we have a relation R. Relation is something that says how 2 sets are related. Here, Relation , R is a<b, where a is element of set A and B is element of set B.
Example, a=5, 5 is element of set A
b=9, element of set B.
Now, a<b.
So, we can write an element of set R=(5,9), a 5 and 9 satisfy the given conditions.
Similarly, (5,10) , (7,9) etc all belong to relation R.
We will get a set for R, which gives all values for elements that satisfy given condition

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