Geometric Series

Evaluate the geometric series described.
 $3+15+75+375...,\ \ \ \ n=6$  

• 11,718

• 10,603

• 9,769

•  $-\frac{3}{4}$  

Tags

CCSS.HSA.SSE.B.4

Evaluate the geometric series $1-2+4-8,\ ...,\ \ \ \ \ \ \ n=8$  

•  $\frac{1}{3}$  

• -86

• -87

• -85

Tags

CCSS.HSA.SSE.B.4

 $a_1=-2,\ \ \ r=-2,\ \ \ S_n=22$  Determine the number of terms n in the series

• 6

• 7

• 8

• 5

Tags

CCSS.HSA.SSE.B.4

 $2,\ 10,\ 50,\ 250,\ ...$  Find the explicit formula

•  $a_n=10\cdot4^{\left(n-1\right)}$  

•  $a_n=2\cdot5^{\left(n-1\right)}$  

•  $a_n=10\cdot5^{\left(n-1\right)}$  

•  $a_n=5\cdot2^{\left(n-1\right)}$  

Tags

CCSS.HSF.BF.A.2

Find the common ratio: 16, 8, 4, 2, ...

• r = 2
• r = 8
• r = 1/4
• r = 1/2

Tags

CCSS.HSF.BF.A.2

Find the common ratio: -3, -9, -27, -81, ...

• r = 6
• r = -6
• r = 3
• r = -3

Tags

CCSS.HSF.BF.A.2

Find the sum of the finite geometric series:

• 88419

• 78124

• 91846

• 92234

Tags

CCSS.HSA.SSE.B.4