Question

Match the sequence (term) with the correct type of sequence (definition).

Match Term Definition

128, 32, 8, 2, … A) Geometric, common ratio is 3

1, 3, 9, 27, … B) Geometric, common ratio is 0.25

5, 10, 15, 20, … C) Arithmetic, common difference is −3

20, 17, 14, 11, … D) Arithmetic, common difference is 5

Answer 1

128,32,8,2 ..
32/128 = 0.25
check..
128 * 0.25 = 32
32 * 0.25 = 8
the common ratio is 0.25 (geometric)

1,3,9,27
3/1 = 3
check..
1 * 3 = 3
3 * 3 = 9
9 * 3 = 27
the common ratio is 3 (geometric)

5,10,15,20
10 - 5 = 5
15 - 10 = 5
20 - 15 = 5
common difference is 5 (arithmetic)

20,17,14,11
20 - 3 = 17
17 - 3 = 14
14 - 3 = 11
common difference is -3 (arithmetic)