Question: Exercises 9-14 require techniques from Section 3.1. Find the characteristic polynomial of each matrix, using either a cofactor expansion or the special formula for 3

Exercises 9-14 require techniques from Section 3.1. Find the characteristic polynomial of each matrix, using either a cofactor expansion or the special formula for 3 x 3 determinants described prior to Exercises 15-18 in Section 3.1.
1.

112 040 311 L-2 0 7

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