Sejuta6uvv

Z = f(x;y) where the two independent variables are x and y, while z is the dependent variable The graph of something like z = f(x;y) is a surface in threedimensional space Such graphs are usually quite di–cult to draw by hand Since z = f(x;y) is a function of two variables, if we want to difierentiate we have̓_ A w O Ƀz C X y N V i Z j s Ă _ S ł B N A Ă ΁A u ϐk K ؖ v u Z r ی ̕ی t ۏؖ v ̔ s \ B Z T E o ^ Ƌ ł̌ ł K p ܂ B ܂ p ʂ ɋC ɂȂ ܂The modern tradition of using x, y and z to represent an unknown was introduced by René Descartes in La Géométrie (1637) As a result of its use in algebra, X is often used to represent unknowns in other circumstances (eg Xrays, Generation X, The XFiles, and The Man from Planet X; Printable 3d Vocal Tract Shapes From Mri Data And Their Acoustic And Aerodynamic Properties Scientific Data ƒz[ƒ€ƒx[ƒXŠç "¯Œ^ ƒƒ"ƒY ƒVƒ‡[ƒg