Matricies Yr2

Question 1

What are singular matrices ?

Answer 1

Det A=0 and this means they do not have an inverse

Question 2

Answer 2

Question 3

What is the minor of an element in a 3x3 matrix?

Answer 3

The determinant if the 2x2 matrix that remains after the row and column containing that element have been crossed out.

Question 4

What does the determinant of a 3x3 matrix represent and how was it found?

Answer 4

Represents the volume scale factor. And is found by considering the minors of the matrix.

Question 5

What are the steps to finding the inverse of a 3x 3 matrix by hand?

Question 6

What are the steps to finding the inverse of a 3x 3 matrix?

Answer 6

Question 7

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Question 8

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Question 9

How many different types of intersections of planes are there and what are the conditions under which they occur?

Answer 9

Question 10

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Question 11

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Question 12

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Question 13

What is the difference between principle argument form and modulus argument form?

Answer 13

Principle argument form is taking direction from the positive x axis. (-π <°<π)

Question 14

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Question 15

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Question 16

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Question 17

What is the adjoint/adjuate ?

Answer 17

The transposed matrix of co factors with the correct sign

Question 18

What is the adjoint/adjuate ?

Answer 18

The transposed matrix of co factors with the correct sign

Question 19

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Question 20

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Question 21

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Question 22

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Question 23

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