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If a, b, c are all different from zero and `Delta= |[1+a,1,1],[1,1+b,1],[1,1, 1+c]|=0`, then `(1)/(a)+(1)/(b)+(1)/(c)=`

A

abc

B

`(1)/(abc)`

C

`-a-b-c`

D

`-1`

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The correct Answer is:
D
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HIMALAYA PUBLICATION-MATRICES AND DETERMINANTS-QUESTION BANK
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  2. If (1)/(a)+(1)/(b)+(1)/(c)=0 then |[1+a, 1, 1 ],[1, 1+b, 1],[1,1,1+c]|...

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  3. If a, b, c are all different from zero and Delta= |[1+a,1,1],[1,1+b,1]...

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  4. The value of the determinant : |(1,1,1),(""^mC1,""^(m+1)C1,""^(m+2)C...

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  5. If a , b, c are all different from zero and |(1+a,1,1),(1,1+b,1),(1,...

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  6. |[77,78,79],[76,75,74],[75,74,73]|=

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  7. Delta=|[x+a,b,c],[b,x+c, a],[c,a, x+b]| which of the following is a fa...

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  8. If D=[[1,a,b],[1,b,c],[1,c,a]], then [[a,b,c],[b,c,a],[1,1,1]]=

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  9. The value of the determinant |[a1, la1+mb1, b1],[a2, la2+mb2, b2],[a3,...

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  10. If omega is a complex cube root of unit, then the value of the determi...

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  11. If alpha , beta , gamma are the roots of x^3+px+q=0 , then the value o...

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  12. If ax^(4) + bx^(3) + cx^(2) + dx + e = |{:(x^(3) + 3x , x - 1 , x+ 3) ...

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  13. Delta=|[log x ,log y, log z],[log 2 x, log 2 y, log 2 z],[log 3 x, log...

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  14. The value of the determine : Delta=|(1!,2!,3!),(2!,3!,4!),(3!,4!,5!)| ...

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  15. The determinant: |(xp+y,x,y),(yp+z,y,z),(0,xp+y,yp+z)|=0 if :

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  16. If f(x)=[[x-3 , 2 x^2-18 , 3 x^3-81],[ x-5 , 2 x^2-50 , 4 x^3-500],[ 1...

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  17. The value of n for which the determinant |[8 C3 , 9 C5 , 10 C7 ],[8 C4...

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  18. [[ 1 , 1 , 1],[ 4 , 3 , 2],[ 4^2 , 3^2 , 2^2 ]] =

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  19. If Delta= [[0 , x , -y ],[-x , 0 , z],[ y , -z , 0 ]] then

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  20. Let Delta=|(1,sintheta,1),(-sin theta,1,sintheta),(-1,-sintheta,1)| , ...

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