CBSE Guess > Papers > Important Questions > Class XII > 2011 > Maths > Maths By Mrs. E.Praveen

CBSE CLASS XII

Matrices and Determinants (4 Mark questions)

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21. Using properties of determinants, prove the following

.

22. If a, b, c are positive and unequal, show that value of determinant is negative.
23. Find the matrix X and Y when it is being given that ..
24. Using properties of determinants, Prove that .
25. Using properties of determinants, Prove that .
26. Using properties of determinants Prove that .
27. If A= and I= Find x and y Such that A²= xA + yI. Hence find A^-1. .
28. If Then by mathematical induction show that Where a & b are constant.
29. If , then show that .
30. Prove that .
31. Prove that : .
32. Using properties of determinants prove that .
33. Let show that (aX + bY)³ = a³X + 3a²b Y.
34. Prove that value of the determent is independent of .
35. Solve for
36. 
37. By using the properties of the determinants prove that .
38. .
39. .
40. .
41. .
42. .
43. .
44. .
45. .
46. .
47. If a, b, c are reals, and Show that either a + b+ c =0 or a = b = c.

Submitted By Mrs. E.Praveen
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