Sequences and Series Practice

Find the next 3 terms in this geometric sequence 5,-10,20,-40

• -80,160,-320
• 160,-320,640
• 80,-160,320
• -160,320,-640

What kind of sequence is the pattern 400, 200, 100, 50, 25, ...?

• Arithmetic
• Geometric
• Neither

Tags

CCSS.HSF.BF.A.2

Identify the common difference. 
10, 20, 30, 40, ...

• 5
• 10
• 15
• 20

Tags

CCSS.HSF.BF.A.2

Identify the common difference.
-21, -18, -15, -12, ...

• 4
• 3
• -4
• -3

Tags

CCSS.HSF.BF.A.2

Find the common ratio: 64, -16, 4, -1, ...

• r = -8
• r = -1/4
• r = -4
• r = 4

Tags

CCSS.HSF.BF.A.2

Is the sequence geometric or arithmetic?
3, 6, 9, 12...

• Arithmetic
• Geometric
• Neither

Tags

CCSS.HSF.BF.A.2

Find the explicit formula:
-23, -16, -9, -2, ...

• a_n = -23 + 7(n -1)
• a_n = -23 - 7(n -1)
• a_n = 7 - 23(n -1)
• a_n = 7 + 23(n -1)

Tags

CCSS.HSF.BF.A.2

Find the explicit formula:
-3, -33, -63, -93, ...

• a_n = -3 - 30(n -1)
• a_n = -3 + 30(n -1)
• a_n = -30 - 3(n -1)
• a_n = -30 + 3(n -1)

Tags

CCSS.HSF.BF.A.2

Find the explicit formula if given the following sequence: 1, 3, 9, 27, ...

• f(n) = 3(3)^n-1

• f(n)= 3(5)^n-1

• f(n) = 3^n-1

• f(n) = 15(5)^n-1

Write the explicit formula for the geometric sequence.

• f(n) = 10(2)^n-1

• f(n) = 2(10)^n-1

• f(n) = 10(-2)^n-1

• f(n) = 1/2(10)^n-1

Tags

CCSS.HSF.BF.A.2