Numerical Analysis
Numerical Analysis
3rd Edition
ISBN: 9780134696454
Author: Sauer, Tim
Publisher: Pearson,
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Chapter 7.2, Problem 8CP

Extrapolate the approximate solutions in Computer Problem 6. Use the formula

N ( h ) = w h ( 1 / 2 ) , the finite difference approximation with step size h . How close can extrapolation get to the exact value

y ( 3 / 2 ) by using only the approximate values from

h = 1 / 4 , 1 / 8 , and

1 / 16

?

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3. Suppose that A is 5 x 5 and rank(A)=4. Use this information to answer the following. a. Give a geometric description of nullspace(A). Justify. b. Is A invertible? Justify. c. Give a geometric description of the span of the column vectors of A. What space are the column vectors of A in? Justify. d. What is determinant of A? Justify.
2. Consider the matrix: A || 1 1 -3 14 2 1 01 4 1 2 2 -26 1 -3 1 5] a) What is rank(A)? b) Is A invertible? Justify. c) Find the nullspace(A). Justify. d) Is the trivial solution the only solution to Ax=0? Justify. e) What is the span of the column vectors of A? Justify.
E 5. Suppose that S={v € R²: v = [2x² - 3]}. Is S a subspace of R²? Prove or disprove

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