Sequences & Series

Find the next 3 terms in this geometric sequence 1,4,16,64

• 256,1024,4094
• 256,1022,4094
• 252,1026,4096
• 256,1024,4096

Find the next 3 terms in this geometric sequence -9,3,-1,1/3,-1/9

• 1/27,-1/81,1/243
• -1/18,1/36,-1/72
• -1/27,1/81,-1/243

Given the sequence:
625, -125, 25, -5, ....
Write the explicit rule:
a_n =

•  (-5)(-5)^(n-1)
•  625(-1/5)^(n-1)
•  625(-5)^(n-1)
•  625 + (n-1)(-5)

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

Determine if the sequence is  geometric:  -1,6, -36, 216, . . . .

• no
• yes

225,75,25,8.33

• Geometric sequence with a common ratio of 1/3

• Geometric sequence with a common ratio of 3

• Arithmetic sequence with a common difference of 58

• Common difference of 3

14, 18, 22, 26, ...

• arithmetic sequence with a common difference of 4

• Geometric sequence with a common ratio of 4

• Arithmetic sequence with a common difference of -4

• Geometric sequence with a common ratio of 1/4,

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...

What sequence follows the formula a_n =4n+11

• 4, 15, 26, 37...

• 15, 19, 23, 27...

• 15, 26, 37, 48...

• 11,15, 19, 23...

Find the 32nd term of this sequence.
9, 4, -1, -6, -11, ...

• 81
• -34
• -146
• -225