Problem 2 Given the data set (Xg, Yk): Xo = 1; Xx = Xx-1 + 0.2 for k = 1 and 2; Y* =sin(2x,) a) Write down the 2nd order Lagrange polynomial constructed from the above data. Show the final result in the compact form: ax? + bx + c, where a,b, and c are to be determined.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Problem 2
Given the data set (Xg, Yk); Xo = 1;
Xg = Xg-1+ 0.2 for k = 1 and 2;
Yk =sin(2xx)
a) Write down the 2nd order Lagrange polynomial constructed from the above data. Show the final result in the
compact form: ax? + bx + c, where a, b, and c are to be determined.
b) Plot the obtained polynomial and the original function on the same graph over an interval [1, 1.4]. Use 0.01
increment while plotting the polynomial and original function.
c) Evaluate the error when the generated polynomial is evaluated at x = 1.3?
d) Compare the error obtained in part e with the error bound.
Transcribed Image Text:Problem 2 Given the data set (Xg, Yk); Xo = 1; Xg = Xg-1+ 0.2 for k = 1 and 2; Yk =sin(2xx) a) Write down the 2nd order Lagrange polynomial constructed from the above data. Show the final result in the compact form: ax? + bx + c, where a, b, and c are to be determined. b) Plot the obtained polynomial and the original function on the same graph over an interval [1, 1.4]. Use 0.01 increment while plotting the polynomial and original function. c) Evaluate the error when the generated polynomial is evaluated at x = 1.3? d) Compare the error obtained in part e with the error bound.
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