17. if the lagrangian of a mass m is given by l=mx" + xf, f being a constant, then x() can be obtained in terms of the constants c,. c as (a) c,+ c (b) 2m (c) c

17. If the Lagrangian of a mass m is given by L=mx" + xf, f being a constant, then x() can be obtained in terms of the constants C,. C as (A) c,+ C (B) 2m (C) C,+e,t+m 2m D) c+C,t + f