Problem 1SE: In Exercises 18, evaluate the determinant of the given matrix by (a) cofactor expansion and (b)... Problem 2SE: In Exercises 18, evaluate the determinant of the given matrix by (a) cofactor expansion and (b)... Problem 3SE: In Exercises 18, evaluate the determinant of the given matrix by (a) cofactor expansion and (b)... Problem 4SE: In Exercises 18, evaluate the determinant of the given matrix by (a) cofactor expansion and (b)... Problem 5SE: In Exercises 18, evaluate the determinant of the given matrix by (a) cofactor expansion and (b)... Problem 6SE: In Exercises 18, evaluate the determinant of the given matrix by (a) cofactor expansion and (b)... Problem 7SE: In Exercises 18, evaluate the determinant of the given matrix by (a) cofactor expansion and (b)... Problem 8SE: In Exercises 18, evaluate the determinant of the given matrix by (a) cofactor expansion and (b)... Problem 9SE: Evaluate the determinants in Exercises 36 by using the arrow technique (see Example 7 in Section... Problem 10SE: a. Construct a 4 4 matrix whose determinant is easy to compute using cofactor expansion but hard to... Problem 11SE: Use the determinant to decide whether the matrices in Exercises 14 are invertible. 1. [4233] 2.... Problem 12SE: Use the determinant to decide whether the matrices in Exercises 58 are invertible 5. [301111042] 6.... Problem 13SE: In Exercises 1315, find the given determinant by any method. [5b3b23] Problem 14SE: In Exercises 1315, find the given determinant by any method. [34aa2122a14] Problem 15SE: In Exercises 1315, find the given determinant by any method. [0000300040001000200050000] Problem 16SE: Solve for x. |x131x|=|1032x613x5| Problem 17SE: In Exercises 1724, use the adjoint method (Theorem 2.3.6) to find the inverse of the given matrix,... Problem 18SE: In Exercises 1724, use the adjoint method (Theorem 2.3.6) to find the inverse of the given matrix,... Problem 19SE: In Exercises 1724, use the adjoint method (Theorem 2.3.6) to find the inverse of the given matrix,... Problem 20SE: In Exercises 1724, use the adjoint method (Theorem 2.3.6) to find the inverse of the given matrix,... Problem 21SE: In Exercises 1724, use the adjoint method (Theorem 2.3.6) to find the inverse of the given matrix,... Problem 22SE: In Exercises 1724, use the adjoint method (Theorem 2.3.6) to find the inverse of the given matrix,... Problem 23SE: In Exercises 1724, use the adjoint method (Theorem 2.3.6) to find the inverse of the given matrix,... Problem 24SE: In Exercises 1724, use the adjoint method (Theorem 2.3.6) to find the inverse of the given matrix,... Problem 25SE: Use Cramers rule to solve for x and y in terms of x and y. x=35x45yy=45x+35y Problem 26SE: Use Cramers rule to solve for x and y in terms of x and y. x=xcosysiny=xsin+ycos Problem 27SE: By examining the determinant of the coefficient matrix, show that the following system has a... Problem 28SE: Let A be a 3 3 matrix, each of whose entries is 1 or 0. What is the largest possible value for... Problem 29SE: a. For the triangle in the accompanying figure, use trigonometry to show that... Problem 30SE: Use determinants to show that for all real values of , the only solution of x2y=xxy=y Is x=0,y=0 Problem 31SE: Prove: If A is invertible, then adj(A) is invertible and [adj(A)]1=1det(A)A=adj(A1) Problem 32SE: Prove: If A is an n n matrix, then det[adj(A)]=[det(A)]n1 Problem 33SE: Prove: If the entries in each row of an n n matrix A add up to zero, then the determinant of A is... Problem 34SE: a. In the accompanying figure, the area of the triangle ABC can be expressed as area ABC =area ADEC... Problem 35SE: Use the fact that 21375, 38798, 34162, 40223, 79154 are all divisible by 19 to show that... Problem 36SE: Without directly evaluating the determinant, show that |sincossin(+)sincossin(+)sincossin(+)|=0 Problem 37SE format_list_bulleted