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