UPSKILL MATH PLUS

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Check whether the following sequences are in A.P. or not?
  
(i) \(x + 2\), \(2x + 3\), \(3x + 4\), …
 
 
(ii) \(2\), \(4\), \(8\), \(16\), …
 
 
(iii) 32,52,72,92,...