D WeBWorK: Fall2015-Matixe Calculus question! Chegg x ( > fi https://webwork unc

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D WeBWorK: Fall2015-Matixe Calculus question! Chegg x ( > fi https://webwork unccedu/webwork2/Fall2015-Math2241-002-004/Partial Derivatives and Tangent Planes/9/?user-mmundher&effectiveUser-mmundr; :: Apps Book marks suggested Sites UNC Charlotte Ho. Contact Us BuyEss ER welcome to CPCC Card Balance Hyun P MyMathLab Pearson Essayonlineservice o. O chase online-My Mohanad Log Out MATHEMATICAL ASSOCIATION OF AMERICA Kwebwork / fall2015-math2241-002-004/ partial_derivatives_and_tangent_planes 9 MAIN MENU Courses Homework Sets Partial Derivatives and Tangent Planes: Problem 9 Partial Derivatives and Tangent Planes Problem 9 Previous Problem List Next User Settings Grades (1 point) Find all the first and second order partial derivatives of f(x,y)4sin(21 +y) -6cos(-y) Problems af Problem1 Problem 2 Problem3 Problem 4 Problem 5 Problem 6 Problem 7 Problem 8 Problem 9 Problem 10 Problem 11 of az2 Note: You can earn partial credit on this problem. Preview My Answers Submit Answers https://webwork.uncc ork2/Fall2015 Math2241002-004/Partial Derivatives and Tangent Planes/10/?user=mmundher8 effectiveUser= m mundher8 key-V6fynGV UC06cZOnLZ9XF7NWHxSrmRo&displayMode;=Mathlax&showOldAnswers;=1 ENG 3:35 PM 11/6/2015 Search the web and Windows /d»

Explanation / Answer

df/dx = -8cos(2x+y) + 6sin(x-y)

df/dy = -4cos(2x+y) - 6sin(x-y)

d2f/dx2 = 16sin(2x+y) + 6cos(x+y)

d2f/dy2 = 4sin(2x+y) + 6cos(x+y)

d2f/dxdy = 8sin(2x+y) - 6cos(x+y)

d2f/dydx = 8sin(2x+y) - 6cos(x+y)

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