Page 17 - Math SL HB Sem 1
P. 17
AN
ARITHMETIC MEAN
If a, b , c are three consecutive terms in an arithmetic sequence, then b is the arithmetic
mean of a and c where
b: a+c
2
Examples: (a) Consider the sequence lO 14 lg
, , ,22
14 andl8 are two arithmetic means between l0 and 22
(b) Consider the sequence l0
,
,12 , 14, 16 l g , 20
12, 14,16,18 and 20 are five arithmetic means between l0 and 22
Dxarnple I Find the
arithmetic ntean belween 3 and 25
Example 2: Find [our arithmeti c means that lies between 3 and 23.
