Question

Insert three arithmetic means between 4 and 10.

Answer 1

5.5, 7, 8.5

Explanation:

Find the mean of 4 and 10, that is

`(4+10)/(2)` =
`(14)/(2)` = 7

Now repeat with 4 and 7 and 7 and 10

`(4+7)/(2)` =
`(11)/(2)` = 5.5

`(7+10)/(2)` =
`(17)/(2)` = 8.5

Hence

4, 5.5, 7, 8.5, 10 ← is an arithmetic sequence with d = 1.5