x 2 + 1. .Let z= f(x,y)= e . Find the equation of the target plane at (1,1) , then approximate f (0.9, 1.1). Z=f( 1, 1) =ez 2. Suppose that z=f(x,y)=e* + . Find the second partial derivatives and determine the value of fxx, fyy, fxy, Suppose fx(x,y)= ex ty *(2x) fy(x,y)= ex ty (2y) 3. Only do the red line 1 and 2 . C. P at (0, 1 ) , ( 0 , - 1 ) , ( 75 , 0 ) , ( +3, 0 ) fxx ( x ,y ) = from, f(x) and f(y) tup ( xiy ) - ax , fxy ( x,y ) = ty (x,y ) - day Ig formula D(my ) = ( 6x ) ( 2x ) - (2y) = 12x - 4y 2 . D(o,1 ) = - 420- saddle point at (0,! ) . D (o, ) = - 4KO - D (0 , -1 ) . D ( 7, 10 ) - 470 and fxx ( 75 10 ) =. to local min . at ( x's 10 ). 10 dread max . at ( -is10 Joke: Do at home : find & classify all critical fronts of 1 ) f(xly ) = exty . * 2 ) f ( xy ) - xye ( x ti/2 . More dificult one / ( ontional4. Evaluate the integral using integration techniques 1... Y-l 01 % 3530'3ng 5. Determine if each of the following integrals is convergent or divergent, and if it is find its value. Ma 1275 Notes - Lecture 12 6. Determine if each of the following integrals is convergent or divergent, and if it is find its value. Below is the example Math 1275 Notes - Lecture 12 Example