Same chapter3 marksDifficulty: Medium
If A has 3 elements and B has 4, how many relations and how many functions are there from A to B?
Relations and Functions
3 marksDifficulty: Medium
Find the domain and range of the function f(x) = 1/(x − 3).
Original Khojo Papers practice question — not from a past board paper.
Answer
The domain is all real numbers except 3, and the range is all real numbers except 0.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The function is undefined at x = 3, and no value of x makes 1/(x − 3) equal to zero.
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If A = {1, 2} and B = {a, b}, write A × B and state the number of relations from A to B.
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