1) 91807

15. Define order of a matrix

16. Solve the equation ५२ ஏ « 0.

17 Define Symmetric matrix.

14 0 6
18. For the matrix A=! o al if k A=I find k.
|

[5 7 2
19 If ^ =| 3 1 |, 50५ {})31 | ^ | = 0.
4 6 2

+

20. Define Geometric mean.

Find the marginal cost when the production is 5 units if the cost function of a firm is
C= x5 - 3x? + 2x.

2 2
22. Obtain ५2 where R = 2x - 4%.

23. Show that f (x)= 3x2 - 18x +7is minimum at x = 3.

24. Define Scatter diagram.
(10 x 2 = 20 marks)

Section C (Short Essay/Problem Type)

Answer any six questions.
Each one carries 5 marks.

1 2 1 5
2 and B 1 4 2 | show that(A + 0). 4 + 81.

25. For the matrices A |

26. Define mean deviation about mean. Obtain the mean deviation about mean for the

data 5, 8, 10, 14, 15, 18, 20 and 22.

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