Harley Davidson 73103-96BK OEM 3 Wire Multi-lock Female Connector & Terminals,Led Tail Light Int.Signals Kawasaki NINJA ZX-6R,ZX636,ZX-6RR,ZX-10R,Z750S,ZR750 | eBay,PARTIAL DERIVATIVES] I understand how to get Zx and Zy, but how do you get Zxy? I've attempted several times and I can't figure it out : r/calculus,2 Ways to Solve xy+yz+zx-xyz=2,My professor said that if z is a function of x,y then partial y by x is always 0 But i don't get it. If y changes x also changes right? :,