Numerical Analysis
Numerical Analysis
3rd Edition
ISBN: 9780134696454
Author: Sauer, Tim
Publisher: Pearson,
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Chapter 7.1, Problem 3E

Consider the BVP { y = c y y ( a ) = y a y ( b ) = y b where c > 0 , a < b

  1. Show that there exists a unique solution

y ( t ) on [ a , b ] .

  1. Find a solution of form

y ( t ) = c 1 e d 1 t + c 2 e d 2 t for some c 1 , c 2 , d 1 , d 2 .

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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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