x2 t08 02 induction

53
Mathematical Induction

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Page 1: X2 T08 02 induction

Mathematical Induction

Page 2: X2 T08 02 induction

Mathematical Induction

nni 121

31

211 Prove e.g. 222

Page 3: X2 T08 02 induction

Mathematical Induction

nni 121

31

211 Prove e.g. 222

Test: n = 1

Page 4: X2 T08 02 induction

Mathematical Induction

nni 121

31

211 Prove e.g. 222

Test: n = 1

111.. 2

SHL

Page 5: X2 T08 02 induction

Mathematical Induction

nni 121

31

211 Prove e.g. 222

Test: n = 1

111.. 2

SHL

1112..

SHR

Page 6: X2 T08 02 induction

Mathematical Induction

nni 121

31

211 Prove e.g. 222

Test: n = 1

111.. 2

SHL

1112..

SHR

SHRSHL ....

Page 7: X2 T08 02 induction

Mathematical Induction

nni 121

31

211 Prove e.g. 222

Test: n = 1

111.. 2

SHL

1112..

SHR

SHRSHL ....

kk

knA 12131

211 222

Page 8: X2 T08 02 induction

Mathematical Induction

nni 121

31

211 Prove e.g. 222

Test: n = 1

111.. 2

SHL

1112..

SHR

SHRSHL ....

kk

knA 12131

211 222

1

121

131

211 1 222

kk

knP

Page 9: X2 T08 02 induction

Proof:

2222222 111

31

211

11

31

211

kkk

Page 10: X2 T08 02 induction

Proof:

2222222 111

31

211

11

31

211

kkk

21112

kk

Page 11: X2 T08 02 induction

Proof:

2222222 111

31

211

11

31

211

kkk

21112

kk

2

2

112

kk

kk

Page 12: X2 T08 02 induction

Proof:

2222222 111

31

211

11

31

211

kkk

21112

kk

2

2

112

kk

kk

22

112

kk

kk

Page 13: X2 T08 02 induction

Proof:

2222222 111

31

211

11

31

211

kkk

21112

kk

2

2

112

kk

kk

22

112

kk

kk

22

2

11

12

kkkk

kk

Page 14: X2 T08 02 induction

Proof:

2222222 111

31

211

11

31

211

kkk

21112

kk

2

2

112

kk

kk

22

112

kk

kk

22

2

11

12

kkkk

kk

21

12

kkkk

Page 15: X2 T08 02 induction

Proof:

2222222 111

31

211

11

31

211

kkk

21112

kk

2

2

112

kk

kk

22

112

kk

kk

22

2

11

12

kkkk

kk

21

12

kkkk

112

k

Page 16: X2 T08 02 induction

Proof:

2222222 111

31

211

11

31

211

kkk

21112

kk

2

2

112

kk

kk

22

112

kk

kk

22

2

11

12

kkkk

kk

21

12

kkkk

112

k

112

11

31

211 222

kk

Page 17: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Page 18: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Test: n = 1

Page 19: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Test: n = 1 221 a

Page 20: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Test: n = 1 221 a

2 kaknA

Page 21: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Test: n = 1 221 a

2 kaknA

2 1 1 kaknP

Page 22: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Test: n = 1 221 a

2 kaknA

2 1 1 kaknPProof:

Page 23: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Test: n = 1 221 a

2 kaknA

2 1 1 kaknPProof:

kk aa 21

Page 24: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Test: n = 1 221 a

2 kaknA

2 1 1 kaknPProof:

kk aa 21

22

Page 25: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Test: n = 1 221 a

2 kaknA

2 1 1 kaknPProof:

kk aa 21

22

24

Page 26: X2 T08 02 induction

1for 2 2 11 naaa nn

(ii) A sequence is defined by;

1for 2that Show nan

Test: n = 1 221 a

2 kaknA

2 1 1 kaknPProof:

kk aa 21

22

24

21 ka

Page 27: X2 T08 02 induction

nn

nnn

nnn yx

yxyyxxyx

2,

2 2,5 1111

1for 10 Prove nyx nn

by;definedareandsequencesThe nn yxiii

Page 28: X2 T08 02 induction

nn

nnn

nnn yx

yxyyxxyx

2,

2 2,5 1111

1for 10 Prove nyx nn

Test: n = 1

by;definedareandsequencesThe nn yxiii

Page 29: X2 T08 02 induction

nn

nnn

nnn yx

yxyyxxyx

2,

2 2,5 1111

1for 10 Prove nyx nn

Test: n = 1 10

2511

yx

by;definedareandsequencesThe nn yxiii

Page 30: X2 T08 02 induction

nn

nnn

nnn yx

yxyyxxyx

2,

2 2,5 1111

1for 10 Prove nyx nn

Test: n = 1 10

2511

yx

10 kk yxknA

by;definedareandsequencesThe nn yxiii

Page 31: X2 T08 02 induction

nn

nnn

nnn yx

yxyyxxyx

2,

2 2,5 1111

1for 10 Prove nyx nn

Test: n = 1 10

2511

yx

10 kk yxknA

10 1 11 kk yxknP

by;definedareandsequencesThe nn yxiii

Page 32: X2 T08 02 induction

nn

nnn

nnn yx

yxyyxxyx

2,

2 2,5 1111

1for 10 Prove nyx nn

Test: n = 1 10

2511

yx

10 kk yxknA

10 1 11 kk yxknPProof:

by;definedareandsequencesThe nn yxiii

Page 33: X2 T08 02 induction

nn

nnn

nnn yx

yxyyxxyx

2,

2 2,5 1111

1for 10 Prove nyx nn

Test: n = 1 10

2511

yx

10 kk yxknA

10 1 11 kk yxknPProof:

kk

kkkkkk yx

yxyxyx 2211

by;definedareandsequencesThe nn yxiii

Page 34: X2 T08 02 induction

nn

nnn

nnn yx

yxyyxxyx

2,

2 2,5 1111

1for 10 Prove nyx nn

Test: n = 1 10

2511

yx

10 kk yxknA

10 1 11 kk yxknPProof:

kk

kkkkkk yx

yxyxyx 2211

10 kk yx

by;definedareandsequencesThe nn yxiii

Page 35: X2 T08 02 induction

nn

nnn

nnn yx

yxyyxxyx

2,

2 2,5 1111

1for 10 Prove nyx nn

Test: n = 1 10

2511

yx

10 kk yxknA

10 1 11 kk yxknPProof:

kk

kkkkkk yx

yxyxyx 2211

10 kk yx

1011 kk yx

by;definedareandsequencesThe nn yxiii

Page 36: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Page 37: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Test: n = 1 and n =2

Page 38: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Test: n = 1 and n =2

1.. 1

aSHL

Page 39: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Test: n = 1 and n =2

1.. 1

aSHL

62.12

51..1

SHR

Page 40: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Test: n = 1 and n =2

1.. 1

aSHL

62.12

51..1

SHR

SHRSHL ....

Page 41: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Test: n = 1 and n =2

1.. 1

aSHL

62.12

51..1

SHR

SHRSHL ....

1.. 2

aSHL

Page 42: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Test: n = 1 and n =2

1.. 1

aSHL

62.12

51..1

SHR

SHRSHL ....

1.. 2

aSHL

62.22

51..2

SHR

Page 43: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Test: n = 1 and n =2

1.. 1

aSHL

62.12

51..1

SHR

SHRSHL ....

1.. 2

aSHL

62.22

51..2

SHR

SHRSHL ....

Page 44: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Test: n = 1 and n =2

k

k

k

k aaknknA

251 &

251 &1

1

1

1.. 1

aSHL

62.12

51..1

SHR

SHRSHL ....

1.. 2

aSHL

62.22

51..2

SHR

SHRSHL ....

Page 45: X2 T08 02 induction

1for 1 1121 naaaaa nnn

(iv) The Fibonacci sequence is defined by;

1for 2

51 that Prove

na

n

n

Test: n = 1 and n =2

k

k

k

k aaknknA

251 &

251 &1

1

1

1

1 251 1

k

kaknP

1.. 1

aSHL

62.12

51..1

SHR

SHRSHL ....

1.. 2

aSHL

62.22

51..2

SHR

SHRSHL ....

Page 46: X2 T08 02 induction

Proof: 11 kkk aaa

Page 47: X2 T08 02 induction

Proof: 11 kkk aaa1

251

251

kk

Page 48: X2 T08 02 induction

Proof: 11 kkk aaa1

251

251

kk

211

251

251

251

k

Page 49: X2 T08 02 induction

Proof: 11 kkk aaa1

251

251

kk

211

251

251

251

k

2

1

514

512

251

k

Page 50: X2 T08 02 induction

Proof: 11 kkk aaa1

251

251

kk

211

251

251

251

k

2

1

514

512

251

k

2

1

2

1

51526

251

514522

251

k

k

Page 51: X2 T08 02 induction

Proof: 11 kkk aaa1

251

251

kk

211

251

251

251

k

2

1

514

512

251

k

2

1

2

1

51526

251

514522

251

k

k

1

251

k

Page 52: X2 T08 02 induction

Proof: 11 kkk aaa1

251

251

kk

211

251

251

251

k

2

1

514

512

251

k

2

1

2

1

51526

251

514522

251

k

k

1

251

k

1

1 251

k

ka

Page 53: X2 T08 02 induction

Proof: 11 kkk aaa1

251

251

kk

211

251

251

251

k

2

1

514

512

251

k

2

1

2

1

51526

251

514522

251

k

k

1

251

k

1

1 251

k

ka

Sheets

+

Exercise 10E*