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The area of a triangle with vertices (-3...

The area of a triangle with vertices (-3,0),(3,0) and (0,k) is 9 sq. units. The value of 'k' will be

A

9

B

3

C

`-9`

D

6

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MODERN PUBLICATION-DETERMINANTS-EXERCISE
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  6. Write the value {:|(x,x+1),(x-1,x)|

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  8. The value of x from the equation {:|(x,2,3),(4,x,1),(x,2,5)|=0 is

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  10. If {:|(2,3),(4,5)| = |(x,3),(2x,5)|, then the value of 'x' is ………..

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  12. If A= diag (4, 2, 1) then det. A is equal to :

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  13. If a, b, c, are in A.P, then the determinant |[x+2,x+3,x+2a],[x+3,x+4,...

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  15. The system of linear equations: 3x+y-z=2,x-z=1 and 2x+2y+az=5 has un...

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  16. Let I denote the 3xx3 and P be a matrix obtained by rearranging the co...

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  18. Without expanding the determinant at any stage, prove that {:|(x+1,x+2...

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  19. Consider the following statements: (i) If any two rows or coluns of a ...

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