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IF there are two values of a which makes...

IF there are two values of a which makes determinant `Delta=|{:(1,-2,5),(2,a,-1),(0,4,2a):}|=86` then find the sum of these numbers.

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The correct Answer is:
-4
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ARIHANT PUBLICATION-DETERMINANTS -PART -1 QUESTION FOR PRACTICE
  1. IF |{:(2x,x+3),(2(x+1),x+1):}|=|{:(1,3),(-1,1):}| then find the value ...

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  2. IF A=[(2,3),(3,-1):}]and B=[(1,3),(-1,1):}] then write the value of |...

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  3. IF there are two values of a which makes determinant Delta=|{:(1,-2,5)...

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  4. Evaluate |{:(cosa cos beta, cos a sin beta, -sin a),(-sin beta, cos be...

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  5. Let A be a square matrix of order 3 times 3 Write the value of |2A| wh...

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  6. IF A is 3 times 3 matrix |A| ne 0 and |3A|=k|A| then find the value of...

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  7. Without expanding,show that the following determinant vanishes. abs ((...

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  8. Write the value of Delta=|{:(x+y,y+z,z+x),(z,x,y),(-3,-3,-3):}|

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  9. Show that |{:(a,b,c),(a+2x,b+2y,c+2z),(x,y,z):}|=0

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  10. Write the value of |[2,7,65],[3,8,75],[5,9,86]|

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  11. Find the value of |{:(17,58,97),(19,60,99),(18,59,98):}| without expan...

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  12. Solve for x, |{:(15-2x,11,10),(11-3x,17,16),(7-x,14,13):}|=0

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  13. IF cos 2 theta=0 then simplify |{:(0,cos theta, sin theta),(cos theta,...

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  14. Prove that |(1, a, a^3),(1, b, b^3),(1, c, c^3)|= (a-b)(b-c)(c-a)(a+b+...

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  15. using the properties of determinants prove that |{:(1,x+y,x^2+y^2),(...

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  16. Using properties of determinants prove that |{:(a^2+2a,2a+1,1),(2a+1...

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  17. Prove that the following. [[(a+1)(a+2),a+2,1],[(a+2)(a+3),a+3,1],[(a+3...

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  18. Using properties of determinants solve the following for x, |{:(x+a,x,...

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  19. Solve [[a+x,a-x,a-x],[a-x,a+x,a-x],[a-x,a-x,a+x]]=0

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  20. IF |{:(4-x,4+x,4+x),(4+x,4-x,4+x),(4+x,4+x,4-x):}|=0 then find the val...

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