Samra

Answer to: If the 10th term of the sequence a, a - b, a -2b, a -3b, .... is 20 and the 20th term is 10,then the xth term of the series is

$ a_{10} = a - 9b = 20 $
$ a_{20} = a - 19b = 10 $

$ (a - 9b) - (a - 19b) = 20 -...