lk(2/3 * k - 7/3 * l + 2.2)

pri k=-1.5 i l=0.1:

-1.5*0.1 * (2/3 * (-1.5) - 7/3 * 0.1 + 2.2) =

= -0.15 * ( -3/3 - 0.7/3 + 2.2) =

= -0.15*(-1+2.2- 7/30) =

= -0.15*(1.2- 7/30) =

= -0.15* ( 36/30 - 7/30) =

= -0.15 * 29/30 =

= - 0.145