Find a,b such that 27, a, b-6 are in A.P.

Hi neerajchandak204.., as 27, a and b-6 are in A.P, then 2 a = 27 + b - 6
==> 2 a - b = 21
By trial and error, if a = 11 then b = 1
So 27, 11, - 5 are in A.P with common difference d = 16
There by we can choose any value for a and corresponding b could be found
 
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a- 21=b-3 a+b=-3+21 a+b=18
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