Question 2: (5+15=20 points) a) Find the value of the constant k e R for which...
4. (a Let (sin( x cos( ) dr + (x cos(x + y) - 2) dy. dz= Show that dz is an exact differential and determine the corresponding function f(x,y) Hence solve the differential equation = z sin( Cos( y) 2 x cos( y) dy 10] (b) Find the solution of the differential equation d2y dy 2 y e dx dæ2 initial conditions th that satisfi 1 (0) [15] and y(0) 0
4. (a Let (sin( x cos( ) dr...
Question 5 (5 marks) Consider the differential equation dy2-r (0) dr where r R is a constant. (a) Find the value(s) of r such that the differential equation has at least one equilibrium solution C (b) Determine the equilibrium solution(s) for the value(s) of r found in (a) (c) Use an in (b). Explain your answer. appropriate diagram to determine the stability of the equilibrium solution(s) found
Question 5 (5 marks) Consider the differential equation dy2-r (0) dr where r...
(1 point) A. Let g(t) be the solution of the initial value problem dy dt with g(1)1 Find g(t) B. Let f(t) be the solution of the initial value problem dy dt with f(0) 0 Find f(t). C. Find a constant c so that solves the differential equation in part B and k(1) 13. cE
(1 point) A. Let g(t) be the solution of the initial value problem dy dt with g(1)1 Find g(t) B. Let f(t) be the solution...
Question 14 (12 marks) Consider the following separable differential equation. dy cos(z)(-1) dr (a) Find any constant solutions of this differential equation and hence write down the solution with initial value y=- when r=7 (b) Use partial fractions to evaluate 1 dy. 1 (c) Use the method for solving separable differential equations to solve this DE in the case where y 0 when r T. You may assume that the solution does not cross the constant solutions you found in...
solve 5c
5. (24 points) Find the solution of each of the following initial value problems: a) xy' + 3y = x V),y (1) = 0 (Bernoulli equation) 18 b) y" – 4y' – 12y = 3e5, y (0) =- (Hint: use the method of undetermined 7 coefficients) c) (2xy - 9x?) dx + (2y + x2 + 1) dy = 0,y (0) = - 3 (Hint: first show this is an exact DE)
exact differential equations
2. Solve the initial value problem: (2.1 – y) + (2y – r)y' = 0) with y(1) = 3. 3. Find the numerical value of b that makes the following differential equation exact. Then solve the differential equation using that value of b. (xy? + br’y) + (x + y)x+y = 0
(24 points) Find the solution of each of the following initial value problems: a) xy' + 3y = x V),y(1) = 0 (Bernoulli equation) 18 1 b) y" – 4y - 12y = 3e St, y (0) = , y'(0) - (Hint: use the method of undetermined coefficients) c) (2xy - 9x) dx + (2y + x2 + 1) dy = 0,y (0) = - 3 (Hint: first show this is an exact DE) = -1 7
(15 points) In this problem we consider an equation in differential form M dx + N dy = 0. (- (4xy2 + 4y)) dx +(- (4x²y + 4x))dy = 0 Find My N. If the problem is exact find a function F(x, y) whose differential, dF(x, y) is the left hand side of the differential equation. That is, level curves F(t, y) = C, give implicit general solutions to the differential equation. If the equation is not exact, enter NE...
15. [-75 Points] DETAILS LARCALCET7 5.8.061.MI. Find the particular solution of the differential equation that satisfies the initial condition. 1 dy dx = y(0) = 21 y =
Problem 5 (25 points) Show that the differential equation (siny -ysinx)dx + (cosx + xcosy - y)dy = 0 is exact, and hence find the general solution. Solve the following. Simplify answers as much as possible. (a) (1+y?)dx -xydy = 0 , y(5) - 2 (b) e(sinx)dy +(e X + 1 cosx)dx = 0