Question 1 (a) Determine whether or not the operator P(X) = |X| is linear, where X is any general 2x1 column vector. (b) Let P - P(X) be a linear operator and X the general solution of the linear equation P(X)= B. Let Xị be a particular solution of this equation and Xo the general solution to the homogeneous equation. (1) Show that X1 + Xo is a solution of P(X) = B.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section4.6: Applications And The Perron-frobenius Theorem
Problem 69EQ: Let x=x(t) be a twice-differentiable function and consider the second order differential equation...
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Question 1
(a) Determine whether or not the operator P(X) = |X| is linear, where X is any general 2x1
column vector.
(b) Let P = P(X) be a linear operator and X the general solution of the linear equation
P(X)= B. Let Xị be a particular solution of this equation and Xo the general solution to
the homogeneous equation.
(i) Show that X1 + Xo is a solution of P(X) = B.
(ii) Let V he such that X = X1+ V. Show that V is in the null space of P.
Question 2
Solve the differential equațion
dy 3y - e".
Question 3
Use D-operator metnods to find the real-valued general solution of the equations:
(@) (D -– 3)°(D + 1)y = 0.
(b) (D² + 4D – 5)y = e-«, which satisfies the initial conditions y(0) = } and y'(0) = 2.
(c) (D – 5)(D – 4)(D – 2) y = te.
Question 4
Is the D-operator D² +4D+29 stable or not? If stable, is it underdamped or overdamped? Use
D-operator methods to find the complementary function yo of
(D² + 4D + 29)y = 0.
Question 5
Ue D-operator methods to find the particular solution yı, of the equation
(D² + D + 5)y = L cos 2t.
Transcribed Image Text:Question 1 (a) Determine whether or not the operator P(X) = |X| is linear, where X is any general 2x1 column vector. (b) Let P = P(X) be a linear operator and X the general solution of the linear equation P(X)= B. Let Xị be a particular solution of this equation and Xo the general solution to the homogeneous equation. (i) Show that X1 + Xo is a solution of P(X) = B. (ii) Let V he such that X = X1+ V. Show that V is in the null space of P. Question 2 Solve the differential equațion dy 3y - e". Question 3 Use D-operator metnods to find the real-valued general solution of the equations: (@) (D -– 3)°(D + 1)y = 0. (b) (D² + 4D – 5)y = e-«, which satisfies the initial conditions y(0) = } and y'(0) = 2. (c) (D – 5)(D – 4)(D – 2) y = te. Question 4 Is the D-operator D² +4D+29 stable or not? If stable, is it underdamped or overdamped? Use D-operator methods to find the complementary function yo of (D² + 4D + 29)y = 0. Question 5 Ue D-operator methods to find the particular solution yı, of the equation (D² + D + 5)y = L cos 2t.
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