Across
- 2. (x1+x2/2 and y1+y2/2) this is ___ formula
- 3. If m=n, this matrix is called a ___ matrix
- 6. The matrix containing only the coefficients of the system is called the ___ matrix of the system
- 7. the matrix derived from the coefficients and constant terms of a system of linear equation called ___ matrix
- 10. If each entry of a matrix is a real number,then the matrix is called a real ___
- 13. main diagonal should be 1 and those below it should be ___
- 14. The scalar is usually denoted by (the Greek letter lambda) and is called an eigenvalue of A,and the nonzero column matrix x is called an ___ of A corresponding to lambda
Down
- 1. Matrix is composed of rows and ___
- 4. the elements on the main diagonal are multiplied and subtracted from the product of the other elements(if 2x2)
- 5. ___is a branch of mathematics rich in theory and applications
- 6. The system has exactly one solution(___system)
- 8. ___ means to change rows and columns
- 9. a^2+b^2=c^2 this formula is ___ theorem
- 11. a square matrix is called ___ matrix if all the non-diagonal elements are zero
- 12. To define the determinant of a matrix of order higher than 2,it is convenient to use the notions of ___ and cofactors