Answered

if three arithmetic sequence are inserted between 11 and 39,find the second arithmetic mean.

Sagot :

11 + 39  = 50/2 = 25, the second arithmetic mean
     2

To get the first mean:  11 + 25 = 36/2 = 18
                                     2

The third mean 25 + 39 = 64/2 = 32
                          2

So the arithmetic sequence is:
11, 18, 25, 32, 39