Answer to Question #240984 in Math for cheng

Question

Write the next three terms of sequence:

a.1,2,4,7,11,..

b.9,18,27,36,45,..

c.100,78,54,28,0,...

d,30,35,45,60,80,..

1/2,11/2,23/2,37/2,53/2,..

Answer 1

a. 1,2,4,7,11,16,22,29

The difference starts with 1 and rises by 1 with every step.

b. 9,18,27,36,45,54,63,72

The difference is constant and equals 9.

c. 100,78,54,28,0,-30,-62,-96

The difference starts with -22 and decreases by 2 with every step.

d. 30,35,45,60,80,105,135,170

The difference starts with 5 and rises by 5 with every step.

e. 1/2,11/2,23/2,37/2,53/2,71/2,91/2,113/2

The difference starts with 5 and rises by 1 with every step.