Alg 2 Sequences

Which of the following recursive formulas represents the given sequence.

7, 14, 28, 56, 112, ...

Given the sequence:

25, 21, 17, 13,...

Write the explicit formula that models the sequence.

• a_n = 25 + (n - 1)(4)

• a_n = 25 + (n - 1)(-4)

• a_n = 25(-4)^n-1

• a_n = 25 + (n - 1) - 4

Write the explicit formula for the 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

Given the recursive formula below, find the first five terms.

a₁ = 3

a_n = a_n-1 + 2

• 3, 5, 7, 9, 11

• 5, 7, 9, 11, 13

• 2, 4, 6, 8, 10

• 3, 4, 5, 6, 7

Find the 8th term of a geometric sequence for which a1=2 and r = 7?

• 823,543

• 11,529,602

• 1,647,086

• 5,764,801