question

let  be fixed. if the integral   a(x)  , where c is a constant of integration, then the functions a(x) and b(x) are respectively :

 

 option 1)
  and 

  

  

  

  
 
 option 2)
  and  
 
 option 3)
  and 
 
 option 4)
  and 
 

 

995