Lesson 1 Relations and Functions

Q1. In a one-one function, two distinct inputs have?

same output different outputs no outputs two outputs

Q2. If f(x)=x², find f(-2).

-4 -2 2 4

Q3. A = {1,2}, B = {3,4}. Find n(A × B).

2 3 4 6

Q4. In a function f:A→B, what is A called?

Range Codomain Domain Image

Q5. What is the range of f={(1,2),(2,4),(3,6)}?

{1,2,3} {2,4,6} {1,4,6} {2,3,6}

Q6. If f(x)=2x+1, what is f(3)?

5 6 7 8

Q7. If f(x)=x²+1, find f(−2).

3 4 5 6

Q8. If A={1,2,3} and B={4,5}, what is |A×B|?

4 5 6 8

Q9. f(x)=2x+3 எனில் f(x)=11 ஆக x-ன் மதிப்பு என்ன?

3 4 5 6

Q10. If f(x)=x²−4, what is f(3)?

3 5 7 9