Respuesta :

  • P_1=+3D
  • P_2=-2D

[tex]\\ \bull\tt\dashrightarrow P=P_1+P_2[/tex]

[tex]\\ \bull\tt\dashrightarrow P=+3D-2D=+1D[/tex]

Now

[tex]\\ \bull\tt\dashrightarrow f=\dfrac{1}{P}[/tex]

[tex]\\ \bull\tt\dashrightarrow f=\dfrac{1}{1}[/tex]

[tex]\\ \bull\tt\dashrightarrow f=1m[/tex]