Vector differentials. For these you must use partial differentiation. For each differential only operates on a specic variable. For example, i would differentiate just on X leaving all constants AND other variables like, y, and z unaffected in the differentiation. So, if f = 61' 6x differential operator is V = 66in + 1\" + % ii. Let's try one, note that the vector form is preserved in this operation. We will see this in calculating an electric eld from an electric potential. x2314, note this is a scalar function, and you were asked to nd it would equal 2x31\". The 21. Find Vf = iff = 259:4sz2 + x + 7y