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If area of triangle is 35 sq. units with...

If area of triangle is 35 sq. units with vertices (2,-6), (5, 4) and (k,4) then k is :

A

12

B

`-2`

C

`-12,-2`

D

`12,-2`

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MODERN PUBLICATION-DETERMINANTS-EXERCISE
  1. Let A be a square matrix of order 3 xx 3. Then I kA I is equal to :

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  2. Which of the following is correct

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  3. If area of triangle is 35 sq. units with vertices (2,-6), (5, 4) and (...

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  4. Let A be a non-singular matrix of order 3 xx 3. Then I adj. A I is equ...

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  5. Select the Correct Option If A is an invertible matrix of order 2, the...

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  6. 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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  7. Let A = [[1,sintheta,1],[-sintheta,1,sintheta],[-1,-sintheta,1]], wher...

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  8. If |(2x,5),(8,x)|=|(6,-2),(7,3)| , write the value of x.

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  9. The area of a triangle with vertices (-3,0),(3,0) and (0,k) is 9 sq. u...

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  10. If A,B and C are angles of a triangle, then the determinant: {:|(-1,...

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  11. If determinant A is of order 2xx2 and |A|=3, then the value of |2A| is

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  12. Write the value {:|(x,x+1),(x-1,x)|

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  13. If matric A = {:|(3-2x,x+1),(2,4)| is singular, then x is equal to

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

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  15. If A is a square matrix of order 3 such that |adjA|=16, then |A| is

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

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  17. The cofactor of a13 in {:|(2,-3,5),(6,0,4),(1,5,-7)| is

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

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  19. 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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  20. If a1,a2,a3,……………….. are in A.P., then the value of: {:|(a1,a2,1),(a...

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