Download presentation

Presentation is loading. Please wait.

Published byVanesa Pincock Modified over 4 years ago

1
COMP 170 L2 Page 1 L03: Binomial Coefficients l Purpose n Properties of binomial coefficients n Related issues: the Binomial Theorem and labeling

2
COMP 170 L2 Page 2 Outline l Basic properties l Pascal’s triangle l The Binomial theorem l Labeling and Trinomial coefficients

3
COMP 170 L2 Page 3 Basic properties

4
COMP 170 L2 Page 4 Basic Properties l Correct, but not so telling.

5
COMP 170 L2 Page 5 Proof of.

6
COMP 170 L2 Page 6 Proof of.

7
COMP 170 L2 Page 7 Proof of.

8
COMP 170 L2 Page 8 Basic Properties l Example

9
COMP 170 L2 Page 9 Proof of

10
COMP 170 L2 Page 10

11
COMP 170 L2 Page 11 Proof of

12
COMP 170 L2 Page 12 Proof of

13
COMP 170 L2 Page 13 Summary of Basic Properties

14
COMP 170 L2 Page 14 Outline l Basic properties l Pascal’s triangle l The Binomial theorem l Labeling and Trinomial coefficients

15
COMP 170 L2 Page 15 Pascal’s Triangle

16
COMP 170 L2 Page 16 Pascal’s Triangle l Each entry = sum of the two entries above it

17
COMP 170 L2 Page 17 Pascal’s Triangle l Each entry = sum of the two entries above it l Next row?

18
COMP 170 L2 Page 18 Pascal Relationship l Examples

19
COMP 170 L2 Page 19 Algebraic Proof of Pascal’s Relationship l For reference only. l Will give proof by sum principle. More revealing.

20
COMP 170 L2 Page 20 Proof of Pascal’s Relationship by Sum Principle

21
COMP 170 L2 Page 21 Proof of Pascal’s Relationship by Sum Principle

22
COMP 170 L2 Page 22

23
COMP 170 L2 Page 23 Pascal Relationship

24
COMP 170 L2 Page 24 Outline l Basic properties l Pascal’s triangle l The Binomial theorem l Labeling and Trinomial coefficients

25
COMP 170 L2 Page 25 Expanding Binomials

26
COMP 170 L2 Page 26 The Binomial Theorem l We are concerned with n What is the theorem true?

27
COMP 170 L2 Page 27 Examples l Monomial terms: n Lists of length two, each element can either be x or y. l How many monomial terms with one y (and hence one x) ? n = number of ways to choose 1 place among 2 places n That is the coefficient for the term l Similarly n Coefficient for = number of lists having 0 place for y = n Coefficient for = number of lists having 2 places for y = l So

28
COMP 170 L2 Page 28 Examples l Coefficient for n = number of ways to choose 2 places for 3 places. l Coefficient for n = number of ways to choose i places from 3 places

29
COMP 170 L2 Page 29 Proof of the Binomial Theorem l Coefficient of n = number of lists having y in k places n =number of ways to choose k places from n places n=n=

30
COMP 170 L2 Page 30 Applications of the Binomial Theorem

31
COMP 170 L2 Page 31 Applications of the Binomial Theorem

32
COMP 170 L2 Page 32 Outline l Basic properties l Pascal’s triangle l The Binomial theorem l Labeling and Trinomial coefficients

33
COMP 170 L2 Page 33 Labeling with 2 Colors

34
COMP 170 L2 Page 34 Labeling with 3 Colors

35
COMP 170 L2 Page 35 Trinomial Coefficients

36
COMP 170 L2 Page 36 Number of Partitions

37
COMP 170 L2 Page 37 Trinomial Coefficients The number of ways to partition a set of n places into 3 subsets of k1, k2 and k3 places Each list is of length n, consisting of x, y, z

38
COMP 170 L2 Page 38 18-02-2010: Recap

39
COMP 170 L2 Page 39 18-02-2010: Recap

40
COMP 170 L2 Page 40 Past Exam Question

41
COMP 170 L2 Page 41 Past Exam Question

Similar presentations

OK

1 Binomial Coefficients CS 202 Epp, section ??? Aaron Bloomfield.

1 Binomial Coefficients CS 202 Epp, section ??? Aaron Bloomfield.

© 2019 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google