CBSE Guess > Papers > Important Questions > Class XII > 2009 > Maths > Mathematics By Mr. Aravind CBSE CLASS XII Q. 1. Q. 2. A = Q. 3. A = 2x – 3y = -1 Q. 4. Prove that A = Q. 5. Prove that 3x + 2y + z =6 Q. 6. (a). b) A = Q. 7. Does
Q. 8. (a). An amount of Rs.5000/- is invested in 3 different rates of interests 6%,7%,8% respectively. The total annual income is Rs.358/- and the combined income of the 1st two investments is Rs.70/- more than the 3rd. Find each investment using Matrix Method (b). Show using properties of determinants Q. 9. (a). (b). A = Q. 10. Prove A = Q. 11. (a). Find A adjA in the following
Q. 12. A and B are symmetric prove that :
Q. 13. Solve using Matrix equations:
Q. 14.Suppose A is a square matrix of order 4. We multiply the matrix by a scalar .Express the determinant of that matrix in terms of the scalar Q. 15. A = Q. 16. Inverse of a Matrix using Elementary transformations: Q. 17. Show using properties of determinants that: Q. 18. Paper By Mr. Aravind |