:ρ(0,0,0) > ρ(''r''<sub>1</sub>,0,0), mais ''P''(0) < ''P''(''r''<sub>1</sub>).

:ρ(0,0,0) > ρ(''r''<sub>1</sub>,0,0), mais ''P''(0) < ''P''(''r''<sub>1</sub>).