How do you prove these two expressions.For context this is on homework for electromag 1
>>1458159math undergrad herei have no idea of what am I looking at but it has the same format as the product rule for derivatives
>>1458160I think I see what you mean but is it right to treat the infinitesmal da/dl/dt as part of it? I think the way to solve it has to do with rewriting the terms within the surface/volume integrals
>>1458159