Math 11 Chapter 3Matrices and DeterminantsTest 3

Math 11 Chapter 3
Matrices and Determinants
Test 3

1. If = 0 then x =__________.

a) 1
b) -1
c) -2
d) 2

2. If two rows (columns) of a determinant are identical then value of the determinant is:

a) zero
b) |A|
c) -1
d) Sum of two determinants

3. equation ax + by = K where a 0 , b 0, K 0:

a) Trivial
b) Homogeneous
c) Non trivial
d) Non homogeneous

4. The matrix AAt is:

a) Hermition
b) skew symmetric of order 2x3
c) Symmetric.
d) skew symmetric

5. Rank of matrix depends on:

a) Non zero columns
b) All are Correct
c) No of zeros rows
d) No of non zero rows in echelon form

6. Cofactor of an element a_ijis defined by:

a) (-1)^i+j Mij
b) (-1)^i+j M^-1
c) (-1)ⁱ ^j|A|
d) None of them

7. The matrix A is called real if all of its elements are __________.

a) invertable
b) linear
c) augmented
d) real

8. A matrix which has ________ is called row vector.

a) four rows
b) one row
c) two rows
d) three row

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