. In the last homework you found the general solution to Legendre’s equation: (1 − x...
. In the last homework you found the general solution to Legendre’s equation: (1 − x 2 )y''(x) − 2xy' (x) + n(n + 1)y(x) = 0. when n = 1, for −1 < x < 1, using the method of reduction of order. Now do the same problem a different way using these steps: (a) Let y1(x) = x^m, where m has the value you found in the last homework. Let W(x) = y1(x)y'(x) − y '1(x)y(x) be the Wronskian of this function and the general solution you are looking for. Find a polynomial P(x) such that W(x) = C P(x) , where C is an unknown constant. (b) Plug in W(x) = y1(x)y'(x) − y'1 (x)y(x) into the formula W(x) = C/P(x) and solve for y. Express your answer using one natural logarithm, one square root, and no absolute values. You may use any of the partial fraction decompositions from last week that you need.
Homework Answers
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. In the last homework you found the general solution to
Legendre’s equation: (1 − x...
just focus on A,B,D 1. Homogeneous ODE Find a general solution of the linear non-constant coefficient,...
just focus on A,B,D
1. Homogeneous ODE Find a general solution of the linear non-constant coefficient, homogeneous ODE for y(x) x3y'" – 3xy" + (6 – x2)xy' – (6 – x?)y = 0 as follows. a) You are given that yı(x) = x is a solution to the above homogeneous ODE. Confirm (by substitution) that this is the case. b) Apply reduction of order to find the remaining two solutions, then state the general solution. (Hint: The substitution y2(x) =...
(1 point) The general solution of the homogeneous differential equation can be written as 2 where...
(1 point) The general solution of the homogeneous differential equation can be written as 2 where a, b are arbitrary constants and is a particular solution of the nonhomogeneous equation By superposition, the general solution of the equation 2y 5ryy 18z+1 isyp so yax-1+bx-5+1+3x NOTE: you must use a, b for the arbitrary constants. Find the solution satisfying the initial conditions y(1) 3, y'(1) 8 The fundamental theorem for linear IVPs shows that this solution is the unique solution to...
consider the Riccati equation y'=p(x)+q(x)y+r(x)y^2. If a particular solution y1(x), show that the general solution y(x)...
consider the Riccati equation y'=p(x)+q(x)y+r(x)y^2. If a particular solution y1(x), show that the general solution y(x) has the from y(x)=y1(x)+z(x); where z(x) is the solution of the bernoulli equation: z'-(q+zry1)z=rz^2 Use this technique to find the general solution of the equation, y'=y/x+x^3y^2-x^5. (Hint: Verify that y1(x)=x is a particular solution)
Please prove this solution and explain why y2 can be taken as (x^2)(y1) Problem 2. Find the general solution of the equation Note that one of two linearly independent solutions is yi(r) -e. Solution....
Please prove this solution and explain why y2 can be taken as
(x^2)(y1)
Problem 2. Find the general solution of the equation Note that one of two linearly independent solutions is yi(r) -e. Solution. Using Abel's formula, we get the following relations for the Wronskian dW pi dW 2r1 On the other hand, Comparing these two expression for W(x), we can take y2 :- r2yı. Correspondingly, the general solution is
Problem 2. Find the general solution of the equation Note...
If y is a known nonvanishing solution of y" p(t)y + q(t)y 0, then a second...
If y is a known nonvanishing solution of y" p(t)y + q(t)y 0, then a second solution y2 satisfies 2 У1? where W(y1, y2) is the Wronskian of y1 and y2. To determine y2, use Abel's formula, W(y1, Y2)(t) =C.eJP(t) dt, where C is certain constant that depends on y1 and y2, but not on t. Use the method above o find a second independent solution of the given equation. (х — 1)у" - ху" + у %3D 0, x>...
Problem 1. Find the general solution of an 1D heat equation: T(x, t) = 4Txx(x, t)...
Problem 1. Find the general solution of an 1D heat equation: T(x, t) = 4Txx(x, t) with the boundary conditions T(0,t) = T(2,t) = 0. Note that T(x,t) denotes the temperature profile along x of a uniform rod of length 2. Problem 2. Solve the following 1D wave equation: 0ct(x, t) = 0xx(x, t) with the boundary conditions 0(0,t) = 0,(1,t) = 0, where 8(x, t) refers to the twist angle of a uniform rod of unit length. Problem 3....
Find the general solution of the equation: y'' + 5y = 0 Find the general solution...
Find the general solution of the equation:
y'' + 5y = 0
Find the general solution of the equation and use Euler’s
formula to place the solution in terms of trigonometric
functions:
y'''+y''-2y=0
Find the particular solution of the equation:
y''+6y'+9y=0
where
y1=3
y'1=-2
Part 2: Nonhomogeneous
Equations
Find the general solution of the equation using the method of
undetermined coefficients:
Now find the general solution of the equation using the method
of variation of parameters without using the formula...
(1 point) In general for a non-homogeneous problem " ()y r)y-f(x) assume that yi, ye is...
(1 point) In general for a non-homogeneous problem " ()y r)y-f(x) assume that yi, ye is a fundamental set of solutions for the homogeneous problem y"+p(r)y' +(xy-0. Then the formula for the particular solution using the method of variation of parameters is are where W(z) is the Wronskian given by the determinant where ufe) and u ,-1-nent), d dz. NOTE When evaluating these indefinite integrals we take the arbitrary constant of integration to be zero. So we have- Wed and...
2a,2b, and 2c 1. Assuming x > 0, find the general solution of the following Euler...
2a,2b, and 2c
1. Assuming x > 0, find the general solution of the following Euler equa- tions. f) 5x2y" +12xy' +2y = 0 g) 2y"xy 0 h) a2y" - 2xy =0 i) a2y"-ay-n(n + 2)y 0, where n is a positive integer a) x2y"-3ay 4y 0 b) x2y"-5ay +10y 0 c) 6x2y" +7xy - y 0 d) xy"y0 e) x2y"-3ay' +13y 0 2. Find the solution of the following problems. Before doing these prob- lems, you might want to...
Use the reduction of order method to solve the following problem given one of the solution y1. (a) (x^2 - 1)y'' -2xy' +2y = 0 ,y1=x (b) (2x+1)y''-4(x+1)y'+4y=0 ,y1=e^2x (c) (x^...
Use the reduction of order method to solve the following problem given one of the solution y1. (a) (x^2 - 1)y'' -2xy' +2y = 0 ,y1=x (b) (2x+1)y''-4(x+1)y'+4y=0 ,y1=e^2x (c) (x^2-2x+2)y'' - x^2 y'+x^2 y =0, y1=x (d) Prove that if 1+p+q=0 than y=e^x is a solution of y''+p(x)y'+q(x)y=0, use this fact to solve (x-1)y'' - xy' +y =0
just focus on A,B,D
1. Homogeneous ODE Find a general solution of the linear non-constant coefficient, homogeneous ODE for y(x) x3y'" – 3xy" + (6 – x2)xy' – (6 – x?)y = 0 as follows. a) You are given that yı(x) = x is a solution to the above homogeneous ODE. Confirm (by substitution) that this is the case. b) Apply reduction of order to find the remaining two solutions, then state the general solution. (Hint: The substitution y2(x) =...
(1 point) The general solution of the homogeneous differential equation can be written as 2 where a, b are arbitrary constants and is a particular solution of the nonhomogeneous equation By superposition, the general solution of the equation 2y 5ryy 18z+1 isyp so yax-1+bx-5+1+3x NOTE: you must use a, b for the arbitrary constants. Find the solution satisfying the initial conditions y(1) 3, y'(1) 8 The fundamental theorem for linear IVPs shows that this solution is the unique solution to...
Please prove this solution and explain why y2 can be taken as
(x^2)(y1)
Problem 2. Find the general solution of the equation Note that one of two linearly independent solutions is yi(r) -e. Solution. Using Abel's formula, we get the following relations for the Wronskian dW pi dW 2r1 On the other hand, Comparing these two expression for W(x), we can take y2 :- r2yı. Correspondingly, the general solution is
Problem 2. Find the general solution of the equation Note...
If y is a known nonvanishing solution of y" p(t)y + q(t)y 0, then a second solution y2 satisfies 2 У1? where W(y1, y2) is the Wronskian of y1 and y2. To determine y2, use Abel's formula, W(y1, Y2)(t) =C.eJP(t) dt, where C is certain constant that depends on y1 and y2, but not on t. Use the method above o find a second independent solution of the given equation. (х — 1)у" - ху" + у %3D 0, x>...
Problem 1. Find the general solution of an 1D heat equation: T(x, t) = 4Txx(x, t) with the boundary conditions T(0,t) = T(2,t) = 0. Note that T(x,t) denotes the temperature profile along x of a uniform rod of length 2. Problem 2. Solve the following 1D wave equation: 0ct(x, t) = 0xx(x, t) with the boundary conditions 0(0,t) = 0,(1,t) = 0, where 8(x, t) refers to the twist angle of a uniform rod of unit length. Problem 3....
Find the general solution of the equation:
y'' + 5y = 0
Find the general solution of the equation and use Euler’s
formula to place the solution in terms of trigonometric
functions:
y'''+y''-2y=0
Find the particular solution of the equation:
y''+6y'+9y=0
where
y1=3
y'1=-2
Part 2: Nonhomogeneous
Equations
Find the general solution of the equation using the method of
undetermined coefficients:
Now find the general solution of the equation using the method
of variation of parameters without using the formula...
(1 point) In general for a non-homogeneous problem " ()y r)y-f(x) assume that yi, ye is a fundamental set of solutions for the homogeneous problem y"+p(r)y' +(xy-0. Then the formula for the particular solution using the method of variation of parameters is are where W(z) is the Wronskian given by the determinant where ufe) and u ,-1-nent), d dz. NOTE When evaluating these indefinite integrals we take the arbitrary constant of integration to be zero. So we have- Wed and...
2a,2b, and 2c
1. Assuming x > 0, find the general solution of the following Euler equa- tions. f) 5x2y" +12xy' +2y = 0 g) 2y"xy 0 h) a2y" - 2xy =0 i) a2y"-ay-n(n + 2)y 0, where n is a positive integer a) x2y"-3ay 4y 0 b) x2y"-5ay +10y 0 c) 6x2y" +7xy - y 0 d) xy"y0 e) x2y"-3ay' +13y 0 2. Find the solution of the following problems. Before doing these prob- lems, you might want to...
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