Arithmetic Sequences Recursive Formula

Determine if the following sequence is arithmetic or geometric.

4, 9, 14, 19, 24, ...

• Arithmetic

• Geometric

Determine if the following sequence is arithmetic or geometric.

15, 13, 11, 9, 7, ...

• Arithmetic

• Geometric

Find a₇.

15, 20, 25, 30, 35, ...

• 25

• 35

• 40

• 45

Determine if the following sequence is arithmetic or geometric.

1, 12, 23, 34, 45, ...

• Arithmetic

• Geometric

What is the recursive formula for arithmetic sequences?

• f(n) = f(n-1) + d

• f(n) = f(1) + (n+1)d

• f(n) = f(1) + nd

• f(n) = f(1)+ (n-2)d

Identify the common difference for the given arithmetic sequence.

• d = -7

• d = -8

• d = 7

• d = 3

Find the first four terms of the sequence. a_n= a_(n-1) - 18 where a₁=10

• 18, 8, -2, -12

• 28, 46, 64, 82

• -8, -26, -44, -60

• 10, -8, -26, -44

Find the first four terms of the sequence.

• 21, 28, 35, 42

• 7, 9, 11, 13

• 9, 16, 23, 30

• 16, 23, 30, 37

Find the first four terms of the sequence.

a_n+1= a_n + 9 where a₁= -2

• -2, -11, -20, -29

• 9, 7, 5, 3

• -2, 7, 16, 25

• 9, 18, 27, 36

Find the first four terms of the sequence.

a_n= 2a_(n-1) + n where a₁= 0

• 0, 0, 0, 0

• 0, 1, 4, 12

• 0, 1, 2, 4

• 0, 2, 4, 8