Two system of rectangular axes have the same origin. If a plane cuts them at distance a,b,c and a', b' , c' from the origin , then :

Options

A. `1/a^2+1/b^2+1/c^2+1/(a'^2)+1/(b'^2)+1/(c'^2)=0`
B. `1/a^2-1/b^2-1/c^2-1/(a'^2)-1/(b'^2)-1/(c'^2)=0`
C. `1/a^2+1/b^2-1/c^2-1/(a'^2)-1/(b'^2)-1/(c'^2)=0`
D. `1/a^2+1/b^2+1/c^2+1/(a'^2)+1/(b'^2)-1/(c'^2)=0`

Answer

C