Answers

2014-06-06T21:06:40+05:30
If a,m, and b is an arithmetic sequence ,then m is the arithmetic mean,and:m - a = b - m2m = a = bm = a + b / 2
                 The arithmetic mean or the "mean"between two numbers is sometimes called the AVERAGE of two numbers.


find it out by this method
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2014-06-06T22:31:25+05:30
6 arithmetics means between 3 & 17 so total terms = 8
let common difference is d
17 = 3 + 7d
d = 2
A1 = 3+2 = 5
A2 = 5+2 = 7
A3 = 7+2 = 9
A4 = 9+2 = 11
A5 = 11+2 = 13
A6 = 13+2 =15
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