# Homework 8 Solutions - HW7(Week 8 Solution Math 110 Spring...

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Chapter 5 / Exercise 23
A First Course in Differential Equations with Modeling Applications
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HW7 (Week 8) Solution. Math 110 Spring 2015. 4,2: 8,14,23,25; 5.1: 2(b,d) 3(b,d), 9, 10, 15, 17, 20; 5.2: 2(b,d), 3(b,d), 12, 18 Section 4.2 4.2.8 Answer = -13 4.2.14 Answer = 168 4.2.23 Prove that the determinant of an n × n upper triangular matrix is the product of its diagonal entries. 4.2.25 Prove that det( kA ) = k n det A for any n × n matrix A .
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Chapter 5 / Exercise 23
A First Course in Differential Equations with Modeling Applications
Zill
Expert Verified