Questão 3317237

\(\frac{2}{7Ɛ_0}\left(r^3\sqrt{kr}-a^3\sqrt{ka}\right)\)

\(\frac{2}{7Ɛ_0}\left(r\sqrt{kr}-\frac{a^3}{r^2}\sqrt{ka}\right)\)

\(\frac{1}{6\piƐ_0}\left(r\sqrt{kr}-a\sqrt{ka}\right)\)

\(\frac{1}{7Ɛ_0}\left(r\sqrt{kr}-a\sqrt{ka}\right)\)

\(\frac{1}{14\piƐ_0}\sqrt{k\left(r^7-a^7\right)}\)