Discrete Math Unit 1 and 2 ReviewAuthor: Sturdivant Victoria
Description: match each to its correct pair.
Keywords: , , , , , , online teaching
Content:
Definitions:
0. when can I multiply a scalar by a matrix
1. ways to solve systems of equations
2. rational numbers
3. determinant
4. irrational numbers
5. integers
only
6. inverse of matrix A
7. transpose a matrix
8. inverse of a matrix
9. When can I multiply matrices
10. whole numbers
only
11. How do I find the resulting dimensions from matrix multiplication
12. natural numbers
only
13. when is the inverse undefined
14. What is a row matrix?
15. How do I solve a system by matrices
Answers:
0. A^-1
1. ad-bc
2. when the determinant is 0.
3. Inverse of the coefficient matrix times the constant matrix
4. 5, squrt (36), 10
5. when the row of the second matrix equals to column of the first matrix
6. (1/ad-bc) times
[d -b]
[-c a]
7. when the dimensions are
1x4
8. -5, 0, 4 squrt (64)
9. this is always defined, just multiply b a constant
10. substitution
elimination
matrices
graping
11. use the row of the first matrix and the column of the second matrix.
12. squrt(2)
squrt (8)
13. 0, squrt (25), 4
14. switch the rows and columns
15. .5, -1.5, 0, 10
squrt (100)
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