Both first partial derivatives of the function f(x,y) are zero at the given points. Use the second-derivative test to determine the nature of f(x,y) at each of these points. If the second-derivative test is inconclusive, so state. f(x,y) = -9х + 18ху - у + 81y; (- 3, - 3), (9,9) What is the nature of the function at (- 3, - 3)? O A. f(x,y) has neither a relative maximum nor a relative minimum at (-3, - 3). B. f(x,y) has a relative maximum at (- 3, - 3). C. f(x,y) has a relative minimum at (- 3, - 3). D. The second-derivative test is inconclusive at (- 3, – 3). What is the nature of the function at (9,9)? O A. f(x,y) has neither a relative maximum nor a relative minimum at (9,9). B. f(x,y) has a relative minimum at (9,9). O C. f(x,y) has a relative maximum at (9,9). O D. The second-derivative test is inconclusive at (9,9).

Find the partial derivatives of the function w = V 4r2 + 1s2 + 2t2 dw ds 吕0 DOO O00 F4 F3 F5 F6 F7 F8 F9 $ & * 4 5 6 7 8 Y U శ్రీశ్ శ్రీశి శ్రీతి

Question Let w(z, y, z) = 1 +y? + z2, where z = 3', y = Int, and z = et. Find using the Chain Rule. Provide your answer below: BFEEDBACK MORE INSTRUCTION Tontent attribution