Sequences and Series
Presentation
•
Mathematics
•
9th Grade
•
Medium
Tanjila Rezwan
Used 4+ times
FREE Resource
1 Slide • 13 Questions
1
In a sequence each number is called a term.
The dots at the end mean the sequence continues forever.
a1 is the first term
a2 is the second term
a3 is the third term and so on...
an is the nth term (we will find the equation for the nth term in the next lesson)
2
Multiple Choice
What does a1 represent?
Any term
First term
Last term
3
Multiple Choice
4
Multiple Choice
−34, −26, −18, −10, −2, ...
5
Multiple Choice
6
Multiple Choice
97, 86, 75, 64, ...
7
Multiple Choice
Is the sequence geometric? If so, identify the common ratio.
6, 12, 24, 48
yes, 2
yes, -2
yes, 4
no
8
Multiple Choice
Given the sequence 2, 8, 14, 20, 26, ... What is the common difference?
2
4
6
8
9
Multiple Choice
Write the recursive formula for 6, 17, 28, 39, 50....
an=an-1+11
a1=6
an=an-1-4
a1=6
an=an-1+9
a1=6
an=an-1+6
a1=6
10
Multiple Choice
Find the explicit formula:
-3, -33, -63, -93, ...
an = -3 - 30(n -1)
an = -3 + 30(n -1)
an = -30 - 3(n -1)
an = -30 + 3(n -1)
11
Multiple Choice
What is the common ratio for the sequence:
28, 14, 7, 3.5...
2
1/2
-14
-7
12
Multiple Choice
A
B
C
D
13
Multiple Choice
A
B
C
D
14
Multiple Choice
Sometimes sequences are described in subscript notation.
Given a1=−5 and an=an−1+3 , what are the first 4 terms in the sequence?
-5, -2, 1, 4
-5, -8, -11, -14
3, -2, -7, -12
3, -15, 75, -375
In a sequence each number is called a term.
The dots at the end mean the sequence continues forever.
a1 is the first term
a2 is the second term
a3 is the third term and so on...
an is the nth term (we will find the equation for the nth term in the next lesson)
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