Expression 24: "z" equals "f" left parenthesis, "x" , "y" , right parenthesis left brace, "z" equals 7 , right bracez=fx,yz=7
24
Go to 2D xy-plane view (box icon).
25
The orange curve in the xy-plane is the level set of z=f(x,y) of value 7.
26
Graph the tangent line to the orange LEVEL SET at the black point.
27
Expression 28: negative 2 left parenthesis, "x" minus 1 , right parenthesis positive negative 2 left parenthesis, "y" minus 1 , right parenthesis equals 0 left brace, "z" equals 0 , right brace−2x−1+−2y−1=0z=0
