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English > Maths > All > Relations And Functions

Question

Level

Action

Check if the function $${f}$$ is surjective, where $$f: N \to N$$ such that
$$f(n)=\frac{n+1}{2},......

Level 2

Define the relation $${R}$$ in the set $$N \times N$$ as follows:
For $$({a}, {b}),({c}, {d}) \in......

Level 4

Given a non-empty set $$X$$, define the relation $${R}$$ in $${P}({X})$$ as follows:
For $${A}, {......

Level 4