ASSIGNMENT (MATHS)

CH-1 (DETERMINANTS)

CLASS- 12TH

1.Evaluate

2.If  -1 0.

Prove that 

3.  

4.

5.

6.

7.

8.

9.if a, b, c, are all positive and pth,qthand rth terms of a G.P.,then show that

10. if A = show that A^-1  = A² -6A +11 I 

11.find matrix A satisfying the matrix equation 

  

12.Show that 

13.Use elementary transformation and find inverse ;

14. solve the following system of equations by matrix method ;

i)             ii) 6x -9y -20z = -4 

               4x -15y +10z = -1

3x +y –z = 3                          2x – 3y -5z    = - 1