Q5:(A) If the matrix A = [3 5 7; 10 11 12; 2 4 6; 13 14 15], find (5 only) (1. A([23],[21])2. A (3,:)3. A(:,2)=[]4. CA([2 1 4 3],:)5. A'6. Size(A)

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Answered: Q5: (A) If the matrix A = [3 5 7; 10 11…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Show that if A is square matrix that satisfies the equation 2 A² - A - I = O, then its inverse is A-¹ = 2 A-I. The equation 24² - A - I = O implies that ---Select--- ✓. It follows that ---Select--- ✓. Notice the last equation means that ---Select--- multiplied with A is the identity, which is what we wanted to prove.

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Q5: (A) If the matrix A = [3 5 7; 10 11 12; 2 4 6; 13 14 15], find (5 only) ( 1. A([23],[21]) 2. A (3,:) 3. A(:,2)=[] 4. CA([2 1 4 3],:) 5. A' 6. Siro(A)