Answers

  • Brainly User
2016-06-18T17:22:43+08:00
5 Arithmetic mean  between -9 and 9

Let's get the mean first (which is also the third mean)

Mean = a₁ + an
            -------------
                  2

Mean = -9 + 9
             -------
                2

Mean = 0

The third mean is 0.

The second and third mean are between -9 and 0 are: -6 and ,3

The fourth and fifth mean between 0 and 9 are:  3 and 6.

Therefore, the means are (in bold fonts):

-9,  -6,  -3,  0,  3,  6,  9


 
1 5 1
so -3 is only the third term?
oh
ok i got it
-3 is the second arithmetic mean; 0 is the third arithmetic mean between the given sequence :-)