**Office Hours:** Posted on ccle.ucla.edu

You may also email me at vtkala@math.ucla.edu for a short appointment.

**February 20:**

**February 17:**

- Week 5 worksheet and solutions (Spring 2019)
- Week 6 worksheet and solutions
- Notes 1, 2, 3 (from Fall 2015)
- Exercises 2, 3, 4, 5 from this set of practice problems and solutions (Fall 2015)
- Exercises 1, 7, 8, 9 from this set of practice problems and solutions (Fall 2015)
- Typo on Exercise 1: Last entry should be x_1 – x_2, not x_1 – x_3
- Column space = image, null space = kernel

- This quiz and solutions (Fall 2015)
- Typo on Solution #2d: null(A) = 7, not 8

- Exercises 1, 3, 4, 5, 6, 14, 15, 16, 18, 19, 21 from this set of practice problems and solutions (Fall 2015)
- Correction on #2 statement: the given vectors are
**x**, not**x_B**.

- Correction on #2 statement: the given vectors are
- Exercises 10, 16, 20, 21, 26, 31, 32, 33, 35, 36, 42, 43, 47, 48, 50 from this set of true/false questions and solutions (Fall 2015)

**January 30:**

**January 23:**

- Week 3 worksheet and solutions
- Notes (Spring 2019)
- Practice Problems I and solutions (Spring 2019)
- Typo in #8 statement: First row, third column of left matrix should be -2, not -1.
- Error in #7b solution: The upper right hand term of B^(-1) should be positive, not negative 1. This means the calculation for B^(-3) is incorrect as well.

- Matrix multiplication worksheet and solutions (Spring 2019)
- Typo on #6b solution: solution should be (15, 18), not (15, 34).

**January 16:**

- Solutions to week 2 worksheet
- A similar worksheet and solutions (from Spring 2019)
- Typo on 6b of solutions, solution should be (15, 18), not (15, 34).

**January 9:**