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1.1 Arithmetic Sequences (Solutions).notebook November 23, 2015 Chapter 1 SEQUENCES AND SERIES 1.1 Arithmetic Sequences

1.1 - Arithmetic Sequences (Solutions).notebookkillornmath.weebly.com/.../1.1_-_arithmetic_sequences.pdf · 2019. 10. 4. · 1.1 Arithmetic Sequences (Solutions).notebook November

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Page 1: 1.1 - Arithmetic Sequences (Solutions).notebookkillornmath.weebly.com/.../1.1_-_arithmetic_sequences.pdf · 2019. 10. 4. · 1.1 Arithmetic Sequences (Solutions).notebook November

1.1 ­ Arithmetic Sequences (Solutions).notebook November 23, 2015

Chapter 1

SEQUENCES AND SERIES

1.1Arithmetic Sequences

Page 2: 1.1 - Arithmetic Sequences (Solutions).notebookkillornmath.weebly.com/.../1.1_-_arithmetic_sequences.pdf · 2019. 10. 4. · 1.1 Arithmetic Sequences (Solutions).notebook November

1.1 ­ Arithmetic Sequences (Solutions).notebook November 23, 2015

An arithmetic sequence results when there is common difference that is added to the previous term to get the next term.

Example:

Which of the following sequences are arithmetic?

Page 3: 1.1 - Arithmetic Sequences (Solutions).notebookkillornmath.weebly.com/.../1.1_-_arithmetic_sequences.pdf · 2019. 10. 4. · 1.1 Arithmetic Sequences (Solutions).notebook November

1.1 ­ Arithmetic Sequences (Solutions).notebook November 23, 2015

Arithmetic Sequence formula :

tn = term value of nth termt1 = first termn = term numberd = common difference

tn = t1 + (n­1)d

1) Nick is cutting some ribbons into different lengths. The lengths of a group of 6 ribbons form a sequence. If the lengths of the three shortest ribbons are 12cm, 19cm, and 26cm respectively. 

a) Find the general term  (formula) of the sequence.                         b) Find the length of the longest ribbon group.                                                         

Page 4: 1.1 - Arithmetic Sequences (Solutions).notebookkillornmath.weebly.com/.../1.1_-_arithmetic_sequences.pdf · 2019. 10. 4. · 1.1 Arithmetic Sequences (Solutions).notebook November

1.1 ­ Arithmetic Sequences (Solutions).notebook November 23, 2015

2)   Determine how many terms are in the following sequence: 

  61, 55, 49, ..., ­119.

3) In a sequence t12 = 52  and  t22 = 102.  

a) Determine a formula for the sequence b) find t45.

Page 5: 1.1 - Arithmetic Sequences (Solutions).notebookkillornmath.weebly.com/.../1.1_-_arithmetic_sequences.pdf · 2019. 10. 4. · 1.1 Arithmetic Sequences (Solutions).notebook November

1.1 ­ Arithmetic Sequences (Solutions).notebook November 23, 2015

4) Kristie is training for a half marathon. The time she runs each day forms an arithmetic sequence. On the third day of the training, she ran 30 minutes. On the fifth day of the training, she ran 40 minutes. 

a)  Determine the general term for the sequence.

b) The time to run a half marathon is 110 minutes. On what day of her training will Jessie run for this length of time?

pg. 16 

# 1, 3, 5acd, 6ac, 9, 11, 13, 16, 17, 22