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Explain solution RD Sharma class 12 chapter Functions exercise 2.1 question 9 sub question (ii) maths
Answers (1)
Let is person and b is an ancestor of a
To prove:
The mapping is injective, surjective or not.
Hint:
As for each element x in the domain set, there is a unique related element y in the co-domain set.
So, f is a function.
Solution:
Since the ordered map (a,b) is not a map because "a" can have many ancestors. So the codomain set is not unique.
So, g is not a function.
Note:
If the function does not exist then we can’t show that the function is an injective or surjective.
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