Enter the numbers that correspond to elementary matrices from this list. For example, if just the first two are elementary, you would enter 1,2. You must enter them in increasing order.

Question

Enter the numbers that correspond to elementary matrices from this list. For example, if just the first two are elementary, you would enter 1,2. You must enter them in increasing order.

1  | 0 1 0

1 0 0

0 0 1 |

2  | 5 0 0

0 1 −4

0 0 1 |

3 | 2 0

0 2 |

4 | 1 1

0 1

0 0 |

5 |1 0 0

3 1 0

0 0 1 |

6 | -2 1

1 0 |

7 | 1 0

0 0 |

8 | 4 0

0 1 |

9 | 1 0 0

0 0 5

0 1 0 |

Answer 1

Matrix 1 can be obtained from the 3 x 3 identity matrix by switching rows 1 and 2.

Matrix 5 can be obtained from the 3 x 3 identity matrix by adding 3 times row 1 to row 2.

Matrix 8 can be obtained from the 2 x 2 identity matrix by multiplying row 1 by 4.