0 0 0 0 4. Suppose A, B, C E M3 (R) given by C = 1 3 -2 3 A = 5 4 3 -2 1 -6 3 A B = 4 4 AC = BC 0 1 B A = B C None of These Suppose -2 -1 A = 0-2 -192 16 3 -1 If it exists, find the inverse, A-1 inverse does not exist 912 F none of these 一1-1ー-1014 1 研
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
Need help wit h these 2 questions can have multiple Anwsers for each
![## Matrix Equations and Inverses
### Example 1: Matrix Equality and Multiplication
#### Given Matrices
Suppose the matrices \(A, B, C \in M_3(\mathbb{R})\) are given by:
\[
A = \begin{pmatrix}
1 & 2 & 3 \\
0 & 5 & 4 \\
3 & -2 & 1
\end{pmatrix}, \quad
B = \begin{pmatrix}
4 & -6 & 3 \\
5 & 4 & 4 \\
-1 & 0 & 1
\end{pmatrix}, \quad
C = \begin{pmatrix}
0 & 0 & 0 \\
0 & 0 & 0 \\
4 & -2 & 3
\end{pmatrix}
\]
#### Question
Compare the matrices and choose the correct statement:
- \(A\)
- \(AC = BC\)
- \(A = B\)
- \( \text{None of These} \)
---
### Example 2: Finding the Inverse of a Matrix
#### Given Matrix
Suppose the matrix \(A\) is defined as:
\[
A = \begin{pmatrix}
-2 & -1 & -1 \\
0 & -2 & -192 \\
16 & 3 & -1
\end{pmatrix}
\]
#### Question
If it exists, find the inverse, \(A^{-1}\):
\[
\text{Choices:}
\]
- \(A\)
\[
A = \begin{pmatrix}
\frac{1}{8} & \frac{1}{4} & -\frac{3}{8} \\
1 & \frac{7}{4} & -\frac{3}{4} \\
-\frac{3}{8} & -\frac{7}{4} & \frac{1}{4}
\end{pmatrix}
\]
- \(B\)
\[
B = \begin{pmatrix}
1 & 2 & 0 \\
1 & 1 & \frac{1}{7} \\
-\frac{1}{7} & 1 & 0
\end{pmatrix}
\]
- \(C\)
\[
C = \begin{pmatrix}
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