State proof that the coulomb's Law …

Coulomb's law states that: The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them. The force is along the straight line joining them. The fact is that either you have to assume that coulomb's law is the result of gauss law and then it can be derived , The other one is it is a law and cannot be proved. Multiply by charge and net force is found out. Thus the Coulomb law is derived by assuming gauss law to be valid. Coulomb's law states that: “The force of attraction and repulsion between two point charges is directly proportional to product of their magnitudes and inversely proportional to the square of distance between them.” F=kq1q2/r^2.