2. Consider the linear equation Ax = b, AERmxn, beR. When m > n it is...
4. Consider solving the linear system Ax = b, where A is an rn x n matrix with m < n (under- determined case), by minimizing lle subject to Ar-b. (a) Show that if A Rmxn is full (row) rank, where m n, then AA is invertible. Then show that r.-A7(AAT)-ibis a solution to Ax = b. (b) Along with part (a) and the solution aAT(AA)-b, show that l thus, z is the optimal solution to the minimization problem. and...
how to proof A=m*n matrix with pivot positions in every row, then the equation Ax=b will have a solution for every b element of Rm.
(a) Suppose we want to solve the linear vector-matrix equation Ax b for the vector x. Show that the Gauss elimination algorithm may be written bAbm,B where m 1, This process produces a matrix equation of the form Ux = g , in which matrix U is an upper-triangular matrix. Show that the solution vector x may be obtained by a back-substitution algorithm, in the form Jekel (b) Iterative methods for solving Ax-b work by splitting matrix A into two...
(8) Any depressed quartic can be solved via Ferrari's algorithm. For simplicity, we consider a special case which is easier to deal with by assuming p= 0, Thus we seek to solve f(x) +r r o. The algorithm proceeds as follows (a) Rewrite the equation as b) Add 2r2m m2 to both sides. Here m is a constant we have not yet determined. Show this yields 2 + m)2mm2 (c) Now choose m so that the right hand side is...
Problem 8 Suppose that the matrix equation Ax = b represents a consistent system of m equations in n unknowns and Xo is a specific solution of this system. Show that any solution of this system E can be written in the form x = xo + x1, where x1 is a solution of Ax = 0.
In this problem we consider an equation in differential form M dx + N dy = 0. The equation (2е' — (16х° уе* + 4e * sin(x))) dx + (2eY — 16х*y'е*)dy 3D 0 in differential form M dx + N dy = 0 is not exact. Indeed, we have For this exercise we can find an integrating factor which is a function of x alone since м.- N. N can be considered as a function of x alone. Namely...
b) Consider a simple difference equation ln)- x(n)+ax(n-D), where n7 is the input, y(n) is the output and D is a delay. Draw a block diagram of this filter and give a physical interpretation. Find its impulse response and transfer function. Calculate the zeros of the transfer function in terms of z Find the corresponding frequency response as well as the minimum and maximum values of the magnitude of the frequency response function. b) Consider a simple difference equation ln)-...
Write each statement as True or False (a) If an (nx n) matrix A is not invertible then the linear system Ax-O hns infinitely many b) If the number of equations in a linear system exceeds the number of unknowns then the system 10p solutions must be inconsistent ) If each equation in a consistent system is multiplied through by a constant c then all solutions to the new system can be obtained by multiplying the solutions to the original...
(1 point) In this problem we consider an equation in differential form M d.c + N dy=0. The equation (42 +3=”y 2) dx + (422.1, + 3)dy=0 y in differential form ñ dx + Ñ dy=0 is not exact. Indeed, we have Ñ , -Ñ , For this exercise we can find an integrating factor which is a function of y alone since Ñ , - Ñ , M is a function of y alone. Namely we have (y) =...
Let A e Rmxn. The linear system Ax = b can have either: (i) a unique solution, (ii) no solution, or (iii) infinitely many solutions. If A is square and invertible, there is a unique solution, which can be written as x = A-'b. The concept of pseudoinverse seeks to generalise this idea to non-square matrices and to cases (ii) and (iii). Taking case (ii) of an inconsistent linear system, we may solve the normal equations AT Ar = Ab...