geometric sequences: explicit rule

geometric sequences: explicit rule

9th Grade

12 Qs

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geometric sequences: explicit rule

geometric sequences: explicit rule

Assessment

Quiz

Mathematics

9th Grade

Easy

CCSS
HSF.BF.A.2

Standards-aligned

Created by

Regina Ortiz

Used 8+ times

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12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Is the sequence 2, 4, 12, 48,... geometric?

yes
no

Tags

CCSS.HSF.BF.A.2

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Which formula is used to find the explicit equation for geometric sequences?

an = an-1 + d
an = an-1 * r
an = a1 + d(n-1)
an = a1 * rn-1

Tags

CCSS.HSF.BF.A.2

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Given the sequence:
125, 25, 5, ....
Write the explicit rule:

 t(n) = (125)(5)(n)
 t(n) = 625(1/5)(n)
 t(n) = 625(5)(n)
 t(n) = 125 + 5n

Tags

CCSS.HSF.BF.A.2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Find the general rule for: 64, -32, 16, -8, …  

64(1/2)n-1
(-32)n-1
64(-1/2)n-1
(32)n-1

Tags

CCSS.HSF.BF.A.2

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Write an explicit rule for the general term of the sequence 5, 15, 45, . . . ?

an = an-1 x 3
an = 5(3)n-1
an = 3(5)n-1
an = 5 + (n-1)3

Tags

CCSS.HSF.BF.A.2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which sequence is represented by the equation 2(7)n-1 ?

7, 14, 28, 56...
2, 14, 98, 686...
2, 9, 16, 23...
7,9,11,13...

Tags

CCSS.HSF.BF.A.2

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Write the explicit formula for the following geometric sequence:

10, 20, 40, 80, ...

an = 10(2)n-1

an = 2(10)n-1

an = 10(2)n

an = 2(10)n

Tags

CCSS.HSF.BF.A.2

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