WorksheetsGeometric Sequences and Series PreReview
Total questions: 8
Worksheet time: 20mins
Name
Class
Date
1.
Find the common ratio: 4, -16, 64, -256, ...
a)
r = -4
b)
r = 2
c)
r = -2
d)
r = 4
2.
Which formula is used to find the explicit equation for geometric sequences?
a)
an = an-1 + d
b)
an = an-1 * r
c)
an = a1 + d(n-1)
d)
an = a1 * rn-1
3.
Which formula is used to find the recursive equation for geometric sequences?
a)
an = an-1 + d
b)
an = an-1 * r
c)
an = a1 + d(n-1)
d)
an = a1 * rn-1
4.
Write an explicit rule for the general term of the sequence 5, 15, 45, . . . ?
a)
an = an-1 x 3
b)
an = 5(3)n-1
c)
an = 3(5)n-1
d)
an = 5 + (n-1)3
5.
Is the function
y = 5 * 4x
The same as the function
y = 20x
y = 5 * 4x
The same as the function
y = 20x
a)
No
b)
Yes
c)
Maybe
d)
Probably not
6.
What is the recursive rule for the sequence:
-2, 12, -72, 432, ...
-2, 12, -72, 432, ...
a)
an = -2(-6)n-1
a1=-2
a1=-2
b)
an =an-1 + 10
a1=-2
a1=-2
c)
an = -6⋅an-1
a1=-2
a1 = -2
a1=-2
a1 = -2
d)
an = a(n-1) - 6
a1=-2
a1 = -2
a1=-2
a1 = -2
7.
What is the sum of the first 10 terms for the following geometric series:
2-6+18-54+...
2-6+18-54+...
a)
59048
b)
-29524
c)
524288
d)
3069
8.
What is the sum of the first 10 terms for the following geometric series:
1+1/2+1/4+1/8+1/16+...
1+1/2+1/4+1/8+1/16+...
a)
0.999
b)
0.002
c)
9.8
d)
1.998
100 %
