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2 Rootfinding and fixed points [30 pts] The equation has a single root 5-v 5 2.2361 . . . in the ...
Please answer all questions Q2 2015 a) show that the function f(x) = pi/2-x-sin(x) has at...
Please answer all questions
Q2 2015
a) show that the function f(x) = pi/2-x-sin(x)
has at least one root x* in the interval [0,pi/2]
b)in a fixed-point formulation of the root-finding problem, the
equation f(x) = 0 is rewritten in the equivalent form x = g(x).
thus the root x* satisfies the equation x* = g(x*), and then the
numerical iteration scheme takes the form x(n+1) = g(x(n))
prove that the iterations converge to the root, provided that
the starting...
2. (a) Suppose we have to find the root xof x); that is, we have to solve )0. Fixed-point methods do this by re-writing the equation in the form x·= g(x*) , and then using the iteration scheme : g...
2. (a) Suppose we have to find the root xof x); that is, we have to solve )0. Fixed-point methods do this by re-writing the equation in the form x·= g(x*) , and then using the iteration scheme : g(x) Show this converges (x-→x. as n→o) provided that K < 1 , for all x in some interval x"-a < x < x*+a ( a > 0 ) about the rootx 6 points] (b) Newton's method has the form of...
Consider f(z32. (a) Prove that f(x)3 - 4z 2 has a root in [0,1] (b) Define...
Consider f(z32. (a) Prove that f(x)3 - 4z 2 has a root in [0,1] (b) Define a function g(x) such that x is a fixed point of g if and only if it is a zero 2"- of f. (c) Verify that fixed-point iteration with your function g and zo 0.5 will converge (d) Starting with x,-0.5, perform as many iterations as required to find a root of f to 6 decimal places.
Suppose you want to find a fixed point of a smooth function g(x) on the interval...
Suppose you want to find a fixed point of a smooth function g(x)
on the interval [a,b]
a. Give conditions which would be sufficient to show that fixed
point iteration on g(x), starting with some
[a,b], will converge to the fixed point p.
b. When is this convergence only linear?
c. When is this convergence only quadratic?
d. Suppose a smooth function f(x) has a root p with f '(p) != 0.
Assuming you choose the initial guess close enough...
2a², where [Fixed Point Iterations, 15 pts). Let g(2) = -22 + 3x + a a...
2a², where [Fixed Point Iterations, 15 pts). Let g(2) = -22 + 3x + a a is a parameter. (a) Show that a is a fixed point of g(x). (b) For what values of a does the iteration scheme On+1 = g(n) converge linearly to the fixed point a (provided zo is chosen sufficiently close to a)? (c) Is there a value of a for which convergence is quadratic?
3. (30 pts) (Problem 6.2) Determine the highest real root of f(x) 2x3- 11.7x2 + 17.7x...
3. (30 pts) (Problem 6.2) Determine the highest real root of f(x) 2x3- 11.7x2 + 17.7x -5 a) Graphically. b) Write a MATLAB program using the fixed-point method to determine the root with xo- Write a MATLAB program using the Newton-Raphson method to determine the root with Xo-3. c) d) Write a MATLAB program using the secant method to determine the root with x-1-3 and Xo- 4. e) Compare the relative errors between these three methods at the third iteration...
4) (16 points) The function f(x)= x? – 2x² - 4x+8 has a double root at...
4) (16 points) The function f(x)= x? – 2x² - 4x+8 has a double root at x = 2. Use a) the standard Newton-Raphson, b) the modified Newton-Raphson to solve for the root at x = 2. Compare the rate of convergence using an initial guess of Xo = 1,2. 5) (14 points) Determine the roots of the following simultaneous nonlinear equations using a) fixed-point iteration and b) the Newton-Raphson method: y=-x? +x+0,75 y + 5xy = r? Employ initial...
2. A comparative problem: Determine the highest real root of flx)-2x3-11.7x'+17.7x-5 You will achieve this by...
2. A comparative problem: Determine the highest real root of flx)-2x3-11.7x'+17.7x-5 You will achieve this by performing 3 iterations of the following methods. In each case, calculate the approximate relative error at each iteration (a) The bisection method with starting guesses x 3 and u-4 (b) New Raphson method using Xo 3 as a starting guess. (c) Fixed point iteration usingx 3 as a starting guess but make sure that the method will work (see question 1.b above). (d) Which...
Question 1 1. [5 pts] Give a complete definition of lim f(x) = -oo if... 2....
Question 1
1. [5 pts] Give a complete definition of lim f(x) = -oo if... 2. [25 pts] Give an example of each of the following, or state one or more theorems which show that such an example is impossible: a. A countable collection of nonempty closed proper subsets of R whose union is open. b. A nonempty bounded subset of R with no cluster points. c. A convergent sequence with two convergent subsequences with distinct limits. d. A function...
Elementary Differential Equation Unit Step Function Problem Project 2 A Spring-Mass Event Problenm A mass of...
Elementary Differential Equation Unit Step Function Problem
Project 2 A Spring-Mass Event Problenm A mass of magnitude m is confined to one-dimensional motion between two springs on a frictionless horizontal surface, as shown in Figure 4.P.3. The mass, which is unattached to either spring, undergoes simple inertial motion whenever the distance from the origin of the center point of the mass, x, satisfies lxl < L. When x 2 L, the mass is in contact with the spring on the...
Please answer all questions
Q2 2015
a) show that the function f(x) = pi/2-x-sin(x)
has at least one root x* in the interval [0,pi/2]
b)in a fixed-point formulation of the root-finding problem, the
equation f(x) = 0 is rewritten in the equivalent form x = g(x).
thus the root x* satisfies the equation x* = g(x*), and then the
numerical iteration scheme takes the form x(n+1) = g(x(n))
prove that the iterations converge to the root, provided that
the starting...
2. (a) Suppose we have to find the root xof x); that is, we have to solve )0. Fixed-point methods do this by re-writing the equation in the form x·= g(x*) , and then using the iteration scheme : g(x) Show this converges (x-→x. as n→o) provided that K < 1 , for all x in some interval x"-a < x < x*+a ( a > 0 ) about the rootx 6 points] (b) Newton's method has the form of...
Consider f(z32. (a) Prove that f(x)3 - 4z 2 has a root in [0,1] (b) Define a function g(x) such that x is a fixed point of g if and only if it is a zero 2"- of f. (c) Verify that fixed-point iteration with your function g and zo 0.5 will converge (d) Starting with x,-0.5, perform as many iterations as required to find a root of f to 6 decimal places.
Suppose you want to find a fixed point of a smooth function g(x)
on the interval [a,b]
a. Give conditions which would be sufficient to show that fixed
point iteration on g(x), starting with some
[a,b], will converge to the fixed point p.
b. When is this convergence only linear?
c. When is this convergence only quadratic?
d. Suppose a smooth function f(x) has a root p with f '(p) != 0.
Assuming you choose the initial guess close enough...
2a², where [Fixed Point Iterations, 15 pts). Let g(2) = -22 + 3x + a a is a parameter. (a) Show that a is a fixed point of g(x). (b) For what values of a does the iteration scheme On+1 = g(n) converge linearly to the fixed point a (provided zo is chosen sufficiently close to a)? (c) Is there a value of a for which convergence is quadratic?
3. (30 pts) (Problem 6.2) Determine the highest real root of f(x) 2x3- 11.7x2 + 17.7x -5 a) Graphically. b) Write a MATLAB program using the fixed-point method to determine the root with xo- Write a MATLAB program using the Newton-Raphson method to determine the root with Xo-3. c) d) Write a MATLAB program using the secant method to determine the root with x-1-3 and Xo- 4. e) Compare the relative errors between these three methods at the third iteration...
4) (16 points) The function f(x)= x? – 2x² - 4x+8 has a double root at x = 2. Use a) the standard Newton-Raphson, b) the modified Newton-Raphson to solve for the root at x = 2. Compare the rate of convergence using an initial guess of Xo = 1,2. 5) (14 points) Determine the roots of the following simultaneous nonlinear equations using a) fixed-point iteration and b) the Newton-Raphson method: y=-x? +x+0,75 y + 5xy = r? Employ initial...
2. A comparative problem: Determine the highest real root of flx)-2x3-11.7x'+17.7x-5 You will achieve this by performing 3 iterations of the following methods. In each case, calculate the approximate relative error at each iteration (a) The bisection method with starting guesses x 3 and u-4 (b) New Raphson method using Xo 3 as a starting guess. (c) Fixed point iteration usingx 3 as a starting guess but make sure that the method will work (see question 1.b above). (d) Which...
Question 1
1. [5 pts] Give a complete definition of lim f(x) = -oo if... 2. [25 pts] Give an example of each of the following, or state one or more theorems which show that such an example is impossible: a. A countable collection of nonempty closed proper subsets of R whose union is open. b. A nonempty bounded subset of R with no cluster points. c. A convergent sequence with two convergent subsequences with distinct limits. d. A function...
Elementary Differential Equation Unit Step Function Problem
Project 2 A Spring-Mass Event Problenm A mass of magnitude m is confined to one-dimensional motion between two springs on a frictionless horizontal surface, as shown in Figure 4.P.3. The mass, which is unattached to either spring, undergoes simple inertial motion whenever the distance from the origin of the center point of the mass, x, satisfies lxl < L. When x 2 L, the mass is in contact with the spring on the...
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