Which of the following matrices is in reduced row echelon form? 1 0 -1 2 1 3 (A) 0 1 0 0 [1 02 5 (B) 0 1 -7 5 0 0 1 14 (C) 1 0 0 11 0 001 [₁ 1 0 -5 (D) 0 1 3 00 0

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ChapterP: Prerequisites: Fundamental Concepts Of Algebra
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Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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**Question:**

Which of the following matrices is in *reduced row echelon form*?

**Matrices:**

(A)
\[
\begin{bmatrix}
1 & 0 & -1 & 1 \\
0 & 1 & 2 & 0 \\
0 & 1 & 3 & 1 \\
\end{bmatrix}
\]

(B)
\[
\begin{bmatrix}
1 & 0 & 2 & 5 \\
0 & 1 & -7 & 5 \\
0 & 0 & 1 & 14 \\
\end{bmatrix}
\]

(C)
\[
\begin{bmatrix}
1 & 0 & 0 & 11 & -3 \\
0 & 0 & 1 & 4 \\
\end{bmatrix}
\]

(D)
\[
\begin{bmatrix}
1 & 0 & -5 \\
0 & 1 & 3 \\
0 & 0 & 0 \\
\end{bmatrix}
\]

**Options:**

- ○ A. A
- ○ B. B
- ○ C. C
- ○ D. D

**Explanation:**

The problem requires identifying which matrix is in reduced row echelon form (RREF). A matrix is in RREF if it satisfies the following conditions:

1. The leading entry of each nonzero row is 1.
2. Each leading 1 is the only nonzero entry in its column.
3. The leading 1 in any row is to the right of the leading 1 in the previous row.
4. Rows with all zeroes, if any, are at the bottom of the matrix.

Option (B) satisfies these conditions with a clear staircase pattern and leading 1s, and no nonzero entries elsewhere in their columns.
Transcribed Image Text:**Question:** Which of the following matrices is in *reduced row echelon form*? **Matrices:** (A) \[ \begin{bmatrix} 1 & 0 & -1 & 1 \\ 0 & 1 & 2 & 0 \\ 0 & 1 & 3 & 1 \\ \end{bmatrix} \] (B) \[ \begin{bmatrix} 1 & 0 & 2 & 5 \\ 0 & 1 & -7 & 5 \\ 0 & 0 & 1 & 14 \\ \end{bmatrix} \] (C) \[ \begin{bmatrix} 1 & 0 & 0 & 11 & -3 \\ 0 & 0 & 1 & 4 \\ \end{bmatrix} \] (D) \[ \begin{bmatrix} 1 & 0 & -5 \\ 0 & 1 & 3 \\ 0 & 0 & 0 \\ \end{bmatrix} \] **Options:** - ○ A. A - ○ B. B - ○ C. C - ○ D. D **Explanation:** The problem requires identifying which matrix is in reduced row echelon form (RREF). A matrix is in RREF if it satisfies the following conditions: 1. The leading entry of each nonzero row is 1. 2. Each leading 1 is the only nonzero entry in its column. 3. The leading 1 in any row is to the right of the leading 1 in the previous row. 4. Rows with all zeroes, if any, are at the bottom of the matrix. Option (B) satisfies these conditions with a clear staircase pattern and leading 1s, and no nonzero entries elsewhere in their columns.
Expert Solution
Step 1

To determine which of the following matrices is in reduced row echelon form.A 10-1101200131B 102501-7500114C 10011-3000114D 10-5013000

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