Linear Algebra AF 3.1 # 1-3
#1 (2 parts)
#2 (3 Parts)
= Homework: Section 2.5 A = Solve the equation Ax=b by using the LU factorization given for A. Also solve Ax = b by ordinary row reduction. 3 -6-3 1 0 0 - 1 10 24 1 = - 3 6 X = 2 -3 Let Ly = b and Ux=y. Solve for x and y. = 3 -6-3 0 0 3-1 b= 0-1 3 Question 1, 2.5.1 Part 1 of 2 27 HW Score: 0%, 0 of 5 points O Points: 0 of 1
= Homework: Section 3.1 4 9 5 1 A 9 4 9 -5 Compute the determinant using a cofactor expansion across the first row. Also compute the determinant by a cofactor expansion down the second column. Question 2, 3.1.3 Part 1 of 3 LO HW Score: 0%, 0 of 9 points O Points: 0 of 1 LLE Save Write the expression for the determinant using a cofactor expansion across the first row. Choose the correct answer below. A. Using this expansion, the determinant is (4)(-61)+(-4)(-65) + (9)(56). B. Using this expansion, the determinant is (4)(-61)-(-4)(-65) + (9)(56). O C. Using this expansion, the determinant is (4)(11)+(-4)(101)+(9)(106). D. Using this expansion, the determinant is (4)(11)-(-4)(101)+ (9)(106).
= Homework: Section 3.1 Compute the determinant using a cofactor expansion down the first column. A = - -5 2 2 4 3 0 4 -2 IN a11 C11=det Question 3, 3.1.7 Part 1 of 4 56 ... > Determine the value of the first term in the cofactor expansion. Substitute the value for a₁₁ and complete the matrix for C₁1 below. HW Score: 0%, 0 of 9 points O Points: 0 of 1 Save
Linear Algebra AF 3.1 # 1-3 #1 (2 parts) #2 (3 Parts)
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