Please help

Asked by Rahulsinha1993 | 30th Nov, 2009, 10:48: AM

Expert Answer:

 If a,b,c are in AP  then 2b =a+c 

2(a-b) = 2(a-(a+c)/2 )=(a-c)

Also 2(b-c) =2 ((a+c)/2 -c) =(a-c)

Answered by  | 30th Nov, 2009, 11:53: AM

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