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The value of the determinant Delta = |...

The value of the determinant
`Delta = |((1 - a_(1)^(3) b_(1)^(3))/(1 - a_(1) b_(1)),(1 - a_(1)^(3) b_(2)^(3))/(1 - a_(1) b_(2)),(1 - a_(1)^(3) b_(3)^(3))/(1 - a_(1) b_(3))),((1 - a_(2)^(3) b_(1)^(3))/(1 - a_(2) b_(1)),(1 - a_(2)^(3) b_(2)^(3))/(1 - a_(2) b_(2)),(1 - a_(2)^(3) b_(3)^(3))/(1 - a_(2) b_(3))),((1 - a_(3)^(3) b_(1)^(3))/(1 - a_(3) b_(1)),(1 - a_(3)^(3) b_(2)^(3))/(1 - a_(3) b_(2)),(1 - a_(3)^(3) b_(3)^(3))/(1 - a_(3) b_(3)))|`, is

A

0

B

dependent only on `a_(1), a_(2), a_(3)`

C

dependent only `b_(1), b_(2), b_(3)`

D

dependent on `a_(1), a_(2), a_(3) b_(1), b_(2), b_(3)`

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The correct Answer is:
To solve the determinant given in the question, we will follow these steps: ### Step 1: Rewrite the Determinant The determinant is given as: \[ \Delta = \begin{vmatrix} \frac{1 - a_1^3 b_1^3}{1 - a_1 b_1} & \frac{1 - a_1^3 b_2^3}{1 - a_1 b_2} & \frac{1 - a_1^3 b_3^3}{1 - a_1 b_3} \\ \frac{1 - a_2^3 b_1^3}{1 - a_2 b_1} & \frac{1 - a_2^3 b_2^3}{1 - a_2 b_2} & \frac{1 - a_2^3 b_3^3}{1 - a_2 b_3} \\ \frac{1 - a_3^3 b_1^3}{1 - a_3 b_1} & \frac{1 - a_3^3 b_2^3}{1 - a_3 b_2} & \frac{1 - a_3^3 b_3^3}{1 - a_3 b_3} \end{vmatrix} \] ### Step 2: Factor the Numerator Each term in the determinant can be factored as follows: \[ 1 - a_i^3 b_j^3 = (1 - a_i b_j)(1 + a_i b_j + a_i^2 b_j^2) \] Thus, we can rewrite each entry in the determinant: \[ \Delta = \begin{vmatrix} (1 - a_1 b_1)(1 + a_1 b_1 + a_1^2 b_1^2) & (1 - a_1 b_2)(1 + a_1 b_2 + a_1^2 b_2^2) & (1 - a_1 b_3)(1 + a_1 b_3 + a_1^2 b_3^2) \\ (1 - a_2 b_1)(1 + a_2 b_1 + a_2^2 b_1^2) & (1 - a_2 b_2)(1 + a_2 b_2 + a_2^2 b_2^2) & (1 - a_2 b_3)(1 + a_2 b_3 + a_2^2 b_3^2) \\ (1 - a_3 b_1)(1 + a_3 b_1 + a_3^2 b_1^2) & (1 - a_3 b_2)(1 + a_3 b_2 + a_3^2 b_2^2) & (1 - a_3 b_3)(1 + a_3 b_3 + a_3^2 b_3^2) \end{vmatrix} \] ### Step 3: Simplify the Determinant Now, we can separate the determinant into two parts: \[ \Delta = \begin{vmatrix} 1 - a_1 b_1 & 1 - a_1 b_2 & 1 - a_1 b_3 \\ 1 - a_2 b_1 & 1 - a_2 b_2 & 1 - a_2 b_3 \\ 1 - a_3 b_1 & 1 - a_3 b_2 & 1 - a_3 b_3 \end{vmatrix} \cdot \begin{vmatrix} 1 + a_1 b_1 + a_1^2 b_1^2 & 0 & 0 \\ 0 & 1 + a_2 b_2 + a_2^2 b_2^2 & 0 \\ 0 & 0 & 1 + a_3 b_3 + a_3^2 b_3^2 \end{vmatrix} \] ### Step 4: Evaluate the Determinants The first determinant evaluates to zero if any two rows are linearly dependent, which they are if \( a_i = a_j \) or \( b_i = b_j \) for any \( i \neq j \). The second determinant is a diagonal matrix and does not affect the zero result from the first determinant. ### Final Result Thus, the value of the determinant \( \Delta \) is: \[ \Delta = 0 \]
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The value of the determinant Delta = |(1 + a_(1) b_(1),1 + a_(1) b_(2),1 + a_(1) b_(3)),(1 + a_(2) b_(1),1 + a_(2) b_(2),1 + a_(2) b_(3)),(1 + a_(3) b_(1) ,1 + a_(3) b_(2),1 + a_(3) b_(3))| , is

the value of the determinant |{:((a_(1)-b_(1))^(2),,(a_(1)-b_(2))^(2),,(a_(1)-b_(3))^(2),,(a_(1)-b_(4))^(2)),((a_(2)-b_(1))^(2),,(a_(2)-b_(2))^(2) ,,(a_(2)-b_(3))^(2),,(a_(2)-b_(4))^(2)),((a_(3)-b_(1))^(2),,(a_(3)-b_(2))^(2),,(a_(3)-b_(3))^(2),,(a_(3)-b_(4))^(2)),((a_(4)-b_(1))^(2),,(a_(4)-b_(2))^(2),,(a_(4)-b_(3))^(2),,(a_(4)-b_(4))^(2)):}| is

If |(a_(1),b_(1),c_(1)),(a_(2),b_(2),c_(2)),(a_(3),b_(3),c_(3))| =5 , then the value of Delta = |(b_(2) c_(3) - b_(3) c_(2),a_(3) c_(2) - a_(2) c_(3),a_(2) b_(3) -a_(3) b_(2)),(b_(3) c_(1) - b_(1) c_(3),a_(1) c_(3) - a_(3) c_(1),a_(3) b_(1) - a_(1) b_(3)),(b_(1) c_(2) - b_(2) c_(1),a_(2) c_(1) - a_(1) c_(2),a_(1) b_(2) - a_(2) b_(1))| is

If |(a_(1),b_(1),c_(1)),(a_(2),b_(2),c_(2)),(a_(3),b_(3),c_(3))| =5 , then the value of Delta = |(b_(2) c_(3) - b_(3) c_(2),a_(3) c_(2) - a_(2) c_(3),a_(2) b_(3) -a_(3) b_(2)),(b_(3) c_(1) - b_(1) c_(3),a_(1) c_(3) - a_(3) c_(1),a_(3) b_(1) - a_(1) b_(3)),(b_(1) c_(2) - b_(2) c_(1),a_(2) c_(1) - a_(1) c_(2),a_(1) b_(2) - a_(2) b_(1))| is

The value of |(a_(1) x_(1) + b_(1) y_(1),a_(1) x_(2) + b_(1) y_(2),a_(1) x_(3) + b_(1) y_(3)),(a_(2) x_(1) +b_(2) y_(1),a_(2) x_(2) + b_(2) y_(2),a_(2) x_(3) + b_(2) y_(3)),(a_(3) x_(1) + b_(3) y_(1),a_(3) x_(2) + b_(3) y_(2),a_(3) x_(3) + b_(3) y_(3))| , is

Find the coefficient of x in the determinant |{:((1+x)^(a_(1)b_(1)),(1+x)^(a_(1)b_(2)),(1+x)^(a_(1)b_(3))),((1+x)^(a_(2)b_(1)),(1+x)^(a_(2)b_(2)),(1+x)^(a_(2)b_(3))),((1+x)^(a_(3)b_(1)),(1+x)^(a_(3)b_(2)),(1+x)^(a_(3)b_(3))):}|

If (a_(2)a_(3))/(a_(1)a_(4))=(a_(2)+a_(3))/(a_(1)+a_(4))=3((a_(2)-a_(3))/(a_(1)-a_(4))) , then a_(1),a_(2),a_(3),a_(4) are in

Prove that the value of the following determinant is zero: |{:(a_(1),,la_(1)+mb_(1),,b_(1)),(a_(2),,la_(2)+mb_(2),,b_(2)),( a_(3),,la_(3)+mb_(3),,b_(3)):}|

Show that if x_(1),x_(2),x_(3) ne 0 |{:(x_(1) +a_(1)b_(1),,a_(1)b_(2),,a_(1)b_(3)),(a_(2)b_(1),,x_(2)+a_(2)b_(2),,a_(2)b_(3)),(a_(3)b_(1),,a_(3)b_(2),,x_(3)+a_(3)b_(3)):}| =x_(1)x_(2)x_(3) (1+(a_(1)b_(1))/(x_(1))+(a_(2)b_(2))/(x_(2))+(a_(3)b_(3))/(x_(3)))

The determinant |(b_(1)+c_(1),c_(1)+a_(1),a_(1)+b_(1)),(b_(2)+c_(2),c_(2)+a_(2),a_(2)+b_(2)),(b_(3)+c_(3),c_(3)+a_(3),a_(3)+b_(3))|

OBJECTIVE RD SHARMA ENGLISH-DETERMINANTS-Exercise
  1. The value of |(a,a^(2) - bc,1),(b,b^(2) - ca,1),(c,c^(2) - ab,1)|, is

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  2. Find the number of real root of the equation |0x-a x-b x+a0x-c x+b x+c...

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  3. The repeated factor of the determinant |(y +z,x,y),(z +x,z,x),(x +y,...

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  4. The value of the determinant Delta = |((1 - a(1)^(3) b(1)^(3))/(1 - ...

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  5. The determinant Delta = |(b,c,b alpha +c),(c,d,c alpha + d),(b alpha...

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  6. Delta = |(1//a,1,bc),(1//b,1,ca),(1//c,1,ab)|=

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  7. If |(1 +ax,1 +bx,1 + bx),(1 +a(1) x,1 +b(1) x,1 + c(1) x),(1 + a(2) x,...

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  8. If abc!=0 then |{:(1+a,1,1),(1,1+b,1),(1,1,1+c):}| is

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  9. If 1 + (1)/(a) + (1)/(b) + (1)/(c) = 0, then Delta = |(1 +a,1,1),(1,...

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

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  11. In a Delta ABC, a, b, c are sides and A, B, C are angles opposite to t...

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  12. If |(-12,0,lamda),(0,2,-1),(2,1,15)| = -360, then the value of lamda i...

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  13. If a(i), i=1,2,…..,9 are perfect odd squares, then |{:(a(1),a(2),a(3))...

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  14. If maximum and minimum values of the determinant |{:(1+sin^(2)x,cos...

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  15. If [x] denote the greatest integer less than or equal to x then in ord...

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  16. If a, b gt 0 and Delta (x)= |(x,a,a),(b,x,a),(b,b,x)|, then

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  17. If f(x)=ax^2+bx+c,a,b,cepsilonR and the equation f(x)-x=0 has imaginar...

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  18. Let g(x)|f(x+c)f(x+2c)f(x+3c)f(c)f(2c)f(3c)f^(prime)(c)f^(prime)(2c)f^...

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  19. If a^2+b^2+c^2=-2a n df(x)= |1+a^2x(1+b^2)x(1+c^2)x(1+a^2)x1+b^2x(1+c...

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  20. The coefficicent of x in f(x) =|{:(x,1+sinx,cosx),(1, log(1+x),2),(x^2...

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