Arithmetic Sequences

Find the missing term of the arithmetic sequence.
-15, __, 1, ...

• -7

• 3

• 5

• -10

Determine whether the sequence is arithmetic, geometric, or neither.

• arithmetic

• geometric

• neither

Is this an Arithmetic sequence? 5, 4.25, 3.5, 2.75

• Yes

• No

Is this an arithmetic sequence?  91, 87, 84, 79

• Yes

• No

Is this an Arithmetic sequence? x+3, x+6, x+9

• Yes

• No

What is the common difference? 1213, 1172, 1131, 1090

• 42

• 41

• There is not one

• -41

Find the equation for the n^th term:

2, 7, 12, 17, 22,...

• Un=5+2n

• Un=5+2(n-1)

• Un=2+5n

• Un=2+5(n-1)

Find the equation: for the n^th term

32, 46, 60, 74, 88,...

• Un=32

• Un=32+14n

• Un=32+14(n-1)

• Un=14+32(n-1)

Find u₂₅, given: u₁ = 5; d = 0.5

• 18

• 17

• 15

• 14

Find u₂₂, given the arithmetic sequence 3, 7.5, 12, 16.5

• 96.5

• 95.5

• 93.5

• 97.5