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
If f(x) = 2x + 3 and g(x) = x2, find (f ∘ g)(2) and (g ∘ f)(2).
Original Khojo Papers practice question — not from a past board paper.
Answer
(f ∘ g)(2) = 11 and (g ∘ f)(2) = 49
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
(f ∘ g)(2) = f(4) = 11, while (g ∘ f)(2) = g(7) = 49. The two are different, which shows that composition is not commutative.
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