This video discusses functions including: 1) Defining sets, relations and functions. 2) Describing one-to-one, onto, into and many-to-one functions. 3) Explaining the greatest integer, modulus and signum functions.

1. INTRODUCTIONTO
FUNCTIONS

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3. – Grade 11 maths/nata maths
– Here, we discuss sets, relations and how functions are derived from them.
– We discuss one-one, onto,into and many-one functions
– The modulus, signum and greatest integer functions are also discussed.

9. Question 1

12. Question 2

14. Question 3

17. A
B
C
1
2

18. Question 4

20. A
B
C
D
E
F

21. A
B
C
D
E
F
G

22. A
B
C
D
E

23. A
B
C
1
2

24. Question 5
-1
0
1
2
-2
0
1
4

26. Types of Functions
Greatest integer function

28. Modulus function

30. Signum function
𝑓 𝑥 = 1 , 𝑖𝑓 𝑥 > 0
= - 1 , if x < 0
= 0 , if x = 0

32. What have we learnt?
■ What are sets
■ What are Relations
■ What are functions
■ Types of functions
■ Problems on Sets, Relations, Functions
■ Greatest integer function, modulus function, signum function.

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