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If x and y are real and x +iy=|{:(6i,-3i...

If x and y are real and x +iy=`|{:(6i,-3i,1),(4,3i,-1),(20,3,i):}|=0` , find x and y

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The correct Answer is:
x=y=0
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CHHAYA PUBLICATION-DETERMINANT -EXERCISE 2B
  1. |{:(15-2x,11-3x,7-x),(11,17,14),(10,16,13):}|=0

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  2. |{:(" "1," "1," "x),(p+3,p+1,p+x),(" "3,x+1,x+1):}|=0

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  3. If x and y are real and x +iy=|{:(6i,-3i,1),(4,3i,-1),(20,3,i):}|=0 , ...

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  4. solve : |{:(x-2,2,5),(x-7,3,6),(2x-6,4,7):}|=0

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  5. solve |{:(x-2," "3," "3),(" "3,x+4," "5),(" "3," "5,x+4):}|=0

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  6. show that x =2 is a root to the equation |{:(x,-6,-1),(2,-3x,x-3),(-...

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  7. |{:(" "1+a^2-b^2," "2ab," "-2b),(" "2ab,1-a^2+b^2," ...

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  8. |{:((b+c)^2," "a^2," "a^2),(" "b^2,(c+a)^2," "b^2),(" "c^2," "c^2,(...

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  9. Factorise : |{:(x,y,z),(x^2,y^2,z^2),(yz,zx,xy):}|

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  10. |{:(b+c,a,b),(c+a,c,a),(a+b,b,c):}|

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  11. If |{:(x,x^2,x^3+1),(y,y^2,y^3+1),(z,z^2,z^3+1):}|=a and x ney nez , p...

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  12. Evaluate |{:(0,c,b),(c,0,a),(b,a,0):}|, hence show that . |{:(0,c,b)...

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  13. Express the square of |{:(a1,b1,0),(a2,b2,0),(a3,b3,0):}| as a third o...

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  14. prove that |{:(a,b,0),(0,a,b),(b,0,a):}|=a^3+b^3 , hence , find the va...

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  15. Prove that , the value of the determinant |{:(x+1,x+2,x+4),(x+3,x+5,...

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  16. |{:(b+c,a-c,a-b),(b-c,c+a,b-a),(c-b,c-a,a+b):}|=8abc

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  17. |{:(" "a^2," "bc,c^2+ca),(a^2+ab," "b^2," "ca),(" "ab,b^2+bc," "c^2...

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  18. |{:(2costheta,1,0),(1,2costheta,1),(0,1,2costheta):}|=(sin4theta)/(sin...

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  19. |{:(a,b,ax+by),(b,c,bx+cy),(ax+by,bx+cy,0):}|=(b^2-ac)(ax^2+2bxy+cy^2)

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  20. |{:(3x^2,3x,1),(x^2+2x,2x+1,1),(2x+1,x+2,1):}|=(x-1)^3

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