Algebra 2 Test on Sections 7.1 to 7.3

Find the next two terms of the arithmetic sequence 8, 2, - 4, . . .

• -8, -12

• 10, 16

• -10, -16

• -6, -8

• 2, 8

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

• Arithmetic

• Geometric

• Neither

• Quadratic

• Rational

Write an explicit formula for the following sequence:

-2, 3, 8, 13, 18...

• a_n = 5n - 7

• a_n = -5n + 8

• a_n = 5 + 3n

• a_n = 5(3)^n-1

• a_n = 5n - 2

What are the first four terms of the explicit sequence... 
 $a_n=\frac{3}{n+2}$ ? 

• 1, 3/4, 3/5, 1/2

• 1, 3/4, 3/5, 2

• 3/2, 1 , 3/4, 3/5

• 1, 3/4, 3/2, 1/2

• 0, 1, 3/4, 1/2

Write an explicit formula for the following sequence:

16, 13, 10, 7, 4...

• a_n = -3n + 16

• a_n = -3n + 19

• a_n = 3n + 13

• a_n = 16n

• a_n = 3n - 13

What is the 50th term in the arithmetic sequence a_n = 4n - 12?

• 186

• -186

• 188

• -188

• 212

Find the 20^th term of 11, 3, -5, -13, -21...

• -141

• 163

• -115

• 171

• -153

What is the common ratio for the geometric sequence:

112, 28, 7, 1.75...

• 4

• 1/4

• 1/2

• -21

• 2

Given the geometric sequence:

125, 25, 5, ....

Write the explicit rule:

• a(n) = (125)(5)⁽ⁿ⁾

• a(n) = 125(1/5)^n-1

• a(n) = 625(5)^n-1

• a(n) = 125(5)^n-1

• a(n) = 125(5)ⁿ⁺¹

Write the explicit formula for the geometric sequence.

• a_n = 4(3)^n-1

• a_n = 3(4)^n-1

• a_n = -4(3)^n-1

• a_n = 3(-4)^n-1

• a_n = 3(-1/4)^n-1