Series and Sequences Test

 $\ \sum_{i=2}^5\left(i+i^2\right)$  Evaluate. 

• 70

• 68

• 108

• 58

A geometric sequence is given below. Find the explicit formula for the  $n^{th}$  term of this sequence.  $10,\ 18,\ 32.4,\ 58.32,\ ...$  

•  $a_n=10\left(1.8\right)^{n–1}$  

•  $a_n=10\left(8\right)^{n–1}$  

•  $a_n=10\left(0.8\right)^{n-1}$  

•  $a_n=8n+2$  

Tags

CCSS.HSF.BF.A.2

Find the sum of the first 25 terms of this sequence:

3, 7, 11, 15,...

• 1098

• 1250

• 1550

• 1275

The following series is arithmetic: $5+8+11+...+116$   
Determine the number of terms in this series. Hint: find n

• 4

• 28

• 36

• 38

Tags

CCSS.HSF.BF.A.2

Find the 22nd term of the following sequence:
5, 8, 11, ...

• 14
• 68
• 63
• 71

Tags

CCSS.HSF.BF.A.2

Identify the common difference.
97, 86, 75, 64, ...

• 8
• 11
• -11
• -8

Tags

CCSS.HSF.BF.A.2

Find S_n for the given series:
a₁=22
d=-8
n=21

• 1911
• -1449
• -2436
• -1218

Find the missing terms of the arithmetic sequence:
145, ___, ___, ___, 205

• 160, 175, 190
• 165, 185, 195
• 155, 165, 175
• 190, 175, 160

Tags

CCSS.HSF.BF.A.2

Is the given sequence geometric?

• Yes

• No

• Cannot be determined

Tags

CCSS.HSF.BF.A.2

Is the given sequence geometric?

• Yes

• No

• Cannot be determined

Tags

CCSS.HSF.BF.A.2