Spring 2023

Math 3120 Introduction to Linear Algebra

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Homework 6

Due Monday April 24, in class
  • Section 5.3 Complex Eigenvectors
    • Read Section 5.3. Do Problem 5.44. WeBWorK reading question due April 12 @ 9:50 am.
    • In class (group work): 5.44, 5.47. Final due date: April 21
    • Homework: 5.46, 5.50, 5.54, 5.56, 5.57
    • Hand In: 5.46*
      • 5.46*. Complete Problem 5.46 on Page 313, but with the matrix \[A=\left[\matrix{0&1&0\cr -1&0&1\cr 0&-1&0\cr}\right].\]
    • WeBWorK assignment for Section 5.3 due April 19 @ 11 pm
  • Section 6.1 The Scalar Product in \(\mathbb{R}^n\)
    • Read Section 6.1. Do the True/False questions (pp. 325-326). Do Problems 6.1(a)(c), 6.2(a)(c)(e). WeBWorK reading question due April 14 @ 9:50 am.
    • In class (group work): 6.1(d), 6.2(b), 6.9. Final due date: April 24
    • Homework: 6.1(b), 6.2(d), 6.3, 6.5, 6.6, 6.7, 6.11 (Use Theorem 6.2.), 6.15
    • Hand In: 6.7*, 6.11
      • 6.7*. Complete Problem 6.7 on Page 327, but with the basis \[\mathcal{B}^{\prime\prime} = \left\{\frac{1}{\sqrt{2}}\left[\matrix{0\cr 1\cr 1\cr}\right],\frac{1}{\sqrt{3}}\left[\matrix{-1\cr 1\cr -1\cr}\right], \frac{1}{\sqrt{6}}\left[\matrix{2\cr 1\cr -1\cr}\right]\right\}.\]
      • 6.11. Complete Problem 6.11 on Page 327 as stated in the text. (Use Theorem 6.2.)
    • WeBWorK assignment for Section 6.1 due April 21 @ 11 pm
  • Section 6.2 Projections: The Gram-Schmidt Process
    • Read Section 6.2. Do the True/False questions (p. 338). Do Problems 6.17(a), 6.20(a)(c). WeBWorK reading question due April 17 @ 9:50 am.
    • In class (group work): 6.17(b), 6.20(b). Final due date: May 1
    • Homework: 6.20(d), 6.21, 6.22 (use the Gram-Schmidt process), 6.24, 6.25, 6.26, 6.27(a)(b), 6.29, 6.36
    • Hand In: 6.20(d)*, 6.22(b)* (use the Gram-Schmidt process), 6.25, 6.27(b)*
      • 6.20(d)*. Complete Problem 6.20(d) on Page 339, but with the ordered set of vectors \[\{[1, 1, -1, -1]^t,[1, 1, 0, 0]^t, [1, 1, 1, -1]^t\}.\]
      • 6.22(b)*. Complete Problem 6.22(b) on Page 339, but where A is the matrix \[A=\left[\matrix{0&1&1\cr -1&0&1\cr 1&-1&0\cr}\right].\] (Use the Gram-Schmidt process)
      • 6.25. Complete Problem 6.25 on Page 339 as stated in the text.
      • 6.27(b)*. Complete Problem 6.27(b) on Page 339, but with the set \(S=\{[1,-3,1,-1]^t,[2,6,1,0]^t\}.\)
    • WeBWorK assignment for Section 6.2 due April 26 @ 11 pm