Answered

what is the formula of arithmetic means?

Sagot :

Cyra4everviz
FORMULA: an=a1+(n-1)d

example: 
Insert 4 arithmetic means between 5 and 25.Find the 4 terms between them.

SOLUTION:   
an=a1+(n-1)d                    ANSWER: 9,13,17,21
a=5+5d                                                     
25=5+5d
25-5=5d
5d = 20
5      5