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(1) (2+2+2 marks] For the following equations, give their order and state whether they are linear...
Question 1 (CLO (1): S marks A) : [2.5 Marks ] In the following equations, the symbols ak & mare constants and the rest are variables. Determine which of these equations are Linear and which are Non-Linear. Low Oway ara -ay= 22-25 O Y = 3z/k + wy(w+y-owy) 2x– Inl1 = ke + 403 - +5y ack - y)=x+3y - 2+mW 72+bx' = y +10 ............ (2) ....... (3) Linear Non-Linear Equation (1) Equation (2) Equation (3) Equation (4) Equation...
Question 410 marks Consider the nonlinear system ェ=(1-y)2(4-12), ỳ=(1-z)y(y2-4) (0<x<2, o<y<2), which has a single fixed point at (1,1) (a) Show that the following expression for K(x, y) is a constant of motion for this system: K(x, y)- 2 ln(ry) + Inl( 2)(y- 2)]-3In(2)(y+2)]. (b) Use the constant of motion to show that the fixed point is a centre of the nonlinear system.
1. (12 points) Classify the following equations as lincar or nonlinear, and state their order. Linear or nonlincar? Order Equation + tdk + t'y = cost they + t dope + t'y = cosy. dy 2y-2
where M=7 322-M2 4) Find the inverse - transform of F(z) = (2-1)(2-2M)' (15 marks) 0 t<-M/2 M <t< - 5) Show that the Fourier transform of function f(t) sin 7 s (10 marks) au 6) Show that u = ln(x2 + xy + y2) satisfies the partial differential equation x x ди +y 2. (7 marks) au 7) Solve the partial differential equation = e-cos(x) where at du x = 0, at =tet ax at and t = 0,...
1. Consider the Lotka-Volterra model for the interaction between a predator population (wolves W(t)) and a prey population (moose M(t)), À = aM - bmw W = -cW+dMW with the four constants all positive. (a) Explain the meaning of the terms. (b) Non-dimensionalize the equations in the form dx/dt = *(1 - y) and dy/dt = xy(x - 1). (c) Find the fixed points, linearize, classify their stability and draw a phase diagram for various initial conditions (again, using a...
Problem 1 (20 points) Given the following non-linear autonomous system, || x' = 2cy " || y' = 9-+ y2 : a) What are the equilibrium points? (2 points) b) Can you tell their stability via linearization? If you can, please determine their stability and if they are locally a sink, a port or a source. If you cannot, please explain why. (3 points) c) Please find a first integral of the form f (2,y) = xg (22 + y2)...
28, 30, 36. pi DIFFERENTIAL EQUATIONS CHAPTER 2 FIRST-ORDER DIFFERE dx - x = 2y2 y(t) = 5 RE Ri = E, i(0) = in. L. R. E, i, constants a = k(T – T.). TO) = To, k, Tm, T, constants 31. x + y = 4x + 1, y(1) = 8 32. y' + 4xy = rer? y(0) = -1 dy + y = ln x, y(1) = 10 dx 34. x(x + 1) + xy = 1,...
All of 10 questions, please. 1. Find and classify all the critical points of the function. f(x,y) - x2(y - 2) - y2 » 2. Evaluate the integral. 3. Determine the volume of the solid that is inside the cylinder x2 + y2- 16 below z-2x2 + 2y2 and above the xy - plane. 4. Determine the surface area of the portion of 2x + 3y + 6z - 9 that is in the 1st octant. » 5. Evaluate JSxz...
2. (28 marks) This questions is about the following system of equations x = (2-x)(y-1) (a) Find all equilibrium solutions and determine their type (e.g., spiral source, saddle) Hint: you should find three equilibria. b) For each of the equilibria you found in part (a), draw a phase portrait showing the behaviour of solutions near that equilibrium. -2 (c) Find the nullclines for the system and sketch them on the answer sheet provided. Show the direction of the vector field...
Differential Equations for Engineers II Page 1 of 6 1. The interface y(x) between air and water in a time-independent open channel flow can be approximated with the second order ODE day d2 +oʻy=0, 20, (1) 1 mark 2 marks 5 marks where the parameter a? is a measure of the mean speed of the flow. The flow is in the positive x direction (i.e. from left to right). (a) Re-write equation (1) as a system of first-order ODEs by...