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- 7. Find and classify all critical points of the function 5 f(z.y, z, w) = a + y + 322 + w? + 3ry + 6zz + 5xw + 4yz + 2yw + 5x – 3y + 6w. %3! Note that your solutions might not be integers.4. Find all the critical points of the function f(x, y) = (x² + y²) exp(y² – x²)2. Find the solution of the following problem: Uu = Uga I> 0, t>0, u(x, 0) = a -, u,(x,0) z, 20, u(0, t) = 0, t2 0.
- дz 1) Find and simplify in terms of r and t using chain rule if given that z=√√4-x² - y², dt x=r cosh ( 2t) and y=r sinh (2t) - 1. 2) By using Lagrange multiplier method, find the maximum value of f (x, y, z)=x+ z subject to the condition x² + y² + z²=10. 3) Use polar coordinate to evaluate 1 S'S_√x² + y² dxdy. 0Find the critical numbers of the functions. a) f(x) = 3x + 4x b) f(x) = x3 – 3x² – 5x c) f(x) = 3x3 - 2x° – 18x d) f(x) = 2x3 + 5x° + 2xSolve the following Cauchy problem: U = uzr -0 0, u(r, 0) = -r, u(r,0) 4r, -02. x = 2t + 3 and y = t – 4 for 0The general solution oj the differential equati x²y" – 2y = Inx² - is cje2x + c2e¬* – x + 글 。 C1x² + c2x¬l – In x + Ciežr + cze¯v2r + ax + b O + cze¬V2r + -글 0 C1x-2 + c2x – In x - 0 cje-2r + cze* – x +0 CJx? + c2x-l + Inx - 극 OSolve these PDEs for u(x,t)S7)Please answer in legible and clear handwriting.3. Find the Absolute Minimum and Absolute Maximum of f(x,y)=xy subject to 2x +8y² =144 Fully demonstrate all steps, including all derivatives, of the LaGrange Multiplier method for full credit.5. (a) Solve the cauchy problem given by x² ux + xyu, + xu = x- y where (x, y) # (0,0) if u(x, xIn x) = – In x, x > 0. (b) Comment on the solution of PDE given in part (a) when K x, ) =SEE MORE QUESTIONSRecommended textbooks for youAdvanced Engineering MathematicsAdvanced MathISBN:9780470458365Author:Erwin KreyszigPublisher:Wiley, John & Sons, IncorporatedNumerical Methods for EngineersAdvanced MathISBN:9780073397924Author:Steven C. Chapra Dr., Raymond P. CanalePublisher:McGraw-Hill EducationIntroductory Mathematics for Engineering Applicat…Advanced MathISBN:9781118141809Author:Nathan KlingbeilPublisher:WILEYMathematics For Machine TechnologyAdvanced MathISBN:9781337798310Author:Peterson, John.Publisher:Cengage Learning,Advanced Engineering MathematicsAdvanced MathISBN:9780470458365Author:Erwin KreyszigPublisher:Wiley, John & Sons, IncorporatedNumerical Methods for EngineersAdvanced MathISBN:9780073397924Author:Steven C. Chapra Dr., Raymond P. CanalePublisher:McGraw-Hill EducationIntroductory Mathematics for Engineering Applicat…Advanced MathISBN:9781118141809Author:Nathan KlingbeilPublisher:WILEYMathematics For Machine TechnologyAdvanced MathISBN:9781337798310Author:Peterson, John.Publisher:Cengage Learning,