Arithmetic Sequences

Type of Sequence

100

3, 5, 7, 9, 11, 13, .....

Arithmetic Sequence

200

8, 16, 32, 64,....

Geometric Sequence

300

2, 3, 5, 8, 13, 21,....

Neither

400

-1, -6, -11, -16, -21,.....

Arithmetic Sequence

500

8, 2, 0.50, 0.125,....

Geometric Sequence

Find the rule

100

15, 12, 9, 6, 3, ....

Minus 3

200

1, 4, 16, 64, 256, 1024

Multiply by 4

300

108, 18, 3, 0.5, ....

Divide by 6

400

-34, -31, -28, -25, ....

Add 3

500

3, 7.5, 18.75, 46.875, ...

Multiply by 2.5

Write the arithmetic sequence formula

100

Given a₁=-9 and d=2

a_n= 2n - 11

200

Given a₁= 2 and d = 7

a_n = 7n - 5 

300

13, 21, 29, 37, ....

a_n=8n + 5

400

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

a_n = -5n + 2

500

2.5, 3, 3.5, 4, 4.5, ....

a_n= 0.5n + 2

Find the next term of the sequence

100

3, 5, 7, 9, 11, 13, .....

15

200

8, 16, 32, 64,....

128

300

-1, -6, -11, -16, -21,.....

-26

400

128, 32, 8, 2, 0.50,....

0.125

500

2, 3, 5, 8, 13, 21,....

34

Find the term using the given formula

100

Find a₂₇

Given a_n = -6n+25

a₂₇=-137

200

Find a₁₄

Given a_n = 2n - 9 

a₁₄=19

300

Find a₁₆

Given a_n = 0.75n + 6

a₁₆ = 18

400

Find a₃₄

Given a_n = -2n + 6

a₃₄= -62

500

Find a₁₀₀

Given a_n = -0.65n + 15

a₁₀₀ = -50