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Compute the determinants of the elementary matrices given in Exercises $25-30 .$ (See Section $2.2 . )$$$\left[\begin{array}{ccc}{k} & {0} & {0} \\ {0} & {1} & {0} \\ {0} & {0} & {1}\end{array}\right]$$

$\operatorname { det } ( A ) = k$

Algebra

Chapter 3

Determinants

Section 1

Introduction to Determinants

Introduction to Matrices

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So you want to find a determinant off this matrix by perfect expansion? SOCO factor expanding by the first rope. We get it. Okay, that's why 1001 and then the zeros. We're gonna forget it. So this is equal to K times. One time. One gives you one mile, zero times zero, giving you zero. This is simply okay.

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