Math test responses of the 5 105 questions

Task 1
Question 1: What is the Matrix?
1. number;
2. Table;
3. vector;
4. function;
5. there is no right answer.
Question 2. What are the numbers in the index at the elements of the matrix?
1. degree;
2. The number of rows and columns;
3. The order of the matrix;
4. The number for which you need to multiply the series element;
5. there is no right answer.
Question 3. How do you know the properties of determinants?
1. 0;
2. 5;
3. 1;
4. 2;
5. 3.
Question 4: What is the record size of the matrix (2x4)?
1. zero matrix;
2. square matrix;
3. The matrix has two rows and four columns;
4. The determinant of the matrix is \u200b\u200bequal to 24;
5. there is no right answer.
Question 5. Will the determinant of the second order, if swap line with the corresponding columns?
1. No
2. yes
3. Yes, if one of the elements of any row is 0
4. The correct answer is 2, and 3
5. no right answer
Task 2
Question 1. What is Minor M11 matrix (3x3)?
1. determinant obtained by calculating the determinant of our matrix by removing the first row and the first column;
2. determinant equal to zero;
3. determinant obtained by calculating the determinant of our matrix by removing the second row and the third column;
4. determinant obtained by calculating the determinant of our matrix by removing the second row and the third column, taken with a minus sign;
5. there is no right answer.
Question 2. How to get the M23?
1. The matrix multiply by two;
2. calculate the determinant of the matrix by removing the 1st row and the first column;
3. there is no right answer;
4. calculate the determinant obtained by deletion of the second row and the third column.
5. All the answers are correct
Question 3. What is the cofactor?
1. Mji;
2. Aik = (- 1) i + to Mik;
3. The determinant of the matrix;
4. The order of the matrix;
5. there is no right answer.
Question 4. Check expansion formula of the determinant of order 3 on the second line?
1.  = a11A11 + A12 + A12 a13A13;
2.  = a21A21 + A22 + A22 a23A23;
3.  = a21A13 + A22 + A23 a31A33;
4.  = a11A23 + A12 + A13 a12A33;
5. there is no right answer.
Question 5: Is it possible to expand the determinant of the fourth order in the first line?
1. no;
2. if the 1-th element is not 0;
3. sometimes;
4. there is no right answer;
5. Yes.
Activity 3
Question 1: Is it possible to add up the matrix A (2x3) and B (2x3)?
1. no;
2. Yes;
3. Only if all the elements of the matrix B = 1;
4. occasionally;
5. there is no right answer.
Question 2: Is it possible to add up the matrix A (2x3) and B (3x4)?
1. yes;
2. No;
3. always;
4. occasionally;
5. there is no right answer.
Question 3. What is the matrix is \u200b\u200bcalled a square?
1. matrix in which the number of rows equals the number of columns;
2. symmetric;
3. The matrix in which the number of lines greater than the number of columns;
4. matrix whose number of rows is less than the number of columns;
5. there is no right answer.
Question 4: Is it possible to multiply the matrix A (2x2) by the number of C?
1. no;
2. Yes, but only if a = 0;
3. yes, wherein the determinant time increase in C;
4. there is no correct answer.
5. Yes.
Question 5. Can I deduct the matrix A (2x3) of the matrix B (2x3)?
1. no;
2. always;
3. sometimes;
4. All the answers are correct
5. there is no right answer.
Task 4
Question 1. What is zero - matrix?
1. The rectangular matrix;
2. matrix, all elements of which - zero;
3. The matrix, which is on the main diagonal are zeros;
4. The identity matrix;
5. there is no right answer.
Question 2: Is it possible to multiply the matrix A (2x2) and B (2x2)?
Question 3: Is it possible to multiply the matrix A (3x4) and B (4x2)?
Question 4: Is it possible to multiply the matrix