Sequence and series

A sequence begins with: 4, 7, 10, 13... What is the 23rd value?

• 33

• 69

• 73

• 70

If a geometric sequence has 36 and 54 as the 2nd and 3rd terms, what are the first and fourth term?

• 18 and 72

• 24 and 82

• 18 and 81

• 24 and 81

Find the 25th term of the arithmetic sequence if a₁ = 5 and d = 0.5

• 18
• 17
• 15
• 14

Tags

CCSS.HSF.BF.A.2

What is the explicit rule for the sequence:
11, 22, 44, 88...

• a_n = 2(11)^n-1
• a_n = 11x2
• a_n = 11(2)^n-1

Tags

CCSS.HSF.LE.A.2

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

Given the sequence:
 25, 21, 17, 13,...
Write the explicit equation that models the sequence.

• a_n = 4n + 29
• a_n = -4n + 25
• a_n = -4n + 29
• a_n = 4n + 25

Tags

CCSS.HSF.BF.A.2

You have $10 in you bank account. It doubles every month. How much money will you have after 5 months?

• $50

• $310

• $320

• $250

Find the sigma notation for the sum of the first 80 terms of this arithmetic series                   3+12+21. . .+714

•  $\Sigma_{n=1}^{80}\ \ 9n-6\ =57360$  

•  $\Sigma_{n=1}^{80}\ \ 9n-6\ =\ 28680$  

•  $\Sigma_{n=1}^{80}\ n+2\ =\ 57360$  

•  $\Sigma_{n=1}^{80}\ \ n+2\ \ =\ 28680$  

In an arithmetic sequence if a₁₅  =108 and d=7, find a₁.

• 14
• 101
• 206
• 10

Tags

CCSS.HSF.BF.A.2

Insert two arthmetic means in between 7 and 28

• 10, 20

• 13, 20

• 14, 21

• 11, 18