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Let |[3,y],[x,1]|=|[3,2],[4,1]| Find pos...

Let `|[3,y],[x,1]|=|[3,2],[4,1]|` Find possible values of x and y if x,y are natural numbers

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To solve the problem, we need to find the values of \(x\) and \(y\) such that the determinant of the matrix \(\begin{bmatrix} 3 & y \\ x & 1 \end{bmatrix}\) is equal to the determinant of the matrix \(\begin{bmatrix} 3 & 2 \\ 4 & 1 \end{bmatrix}\). ### Step 1: Calculate the determinant of the first matrix The determinant of a \(2 \times 2\) matrix \(\begin{bmatrix} a & b \\ c & d \end{bmatrix}\) is given by the formula: \[ \text{det} = ad - bc \] For the matrix \(\begin{bmatrix} 3 & y \\ x & 1 \end{bmatrix}\): ...
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RD SHARMA-DETERMINANTS-Solved Examples And Exercises
  1. If A=[1 2 4 2] , then show that |2A|=4|A| .

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  2. If |x-2-3 3x2x|=3 , find the values of xdot

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  3. Let |[3,y],[x,1]|=|[3,2],[4,1]| Find possible values of x and y if x,y...

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  4. Evaluate the determinant =|(log)3 512(log)4 3(log)3 8(log)4 9| .

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  5. Find the minors of cofactors of elements of the matrix A=[a(i j)]=[[1,...

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  6. Let A=|1sintheta1-sintheta1sintheta-1-sintheta1|, where 0lt=thetalt=2p...

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  7. If [ ] denotes the greatest integer less than or equal to the real nu...

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  8. Prove that the determinant |(x,sin theta,cos theta),(-sin theta,-x,1),...

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  9. Write the minors and cofactors of each element of the first column ...

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  10. Write the minors and cofactors of each element of the first column ...

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  11. Evaluate the following determinants: |x-7x5x+1| (ii) |costheta-sin...

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  12. Evaluate the following determinants: |x-7x5x+1| (ii) |costheta-sin...

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  13. Evaluate: |2 3 7 13 17 5 15 20 12|^2 .

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  14. Show that |sin10o-cos10osin80ocos80o|=1

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  15. Evaluate |2 3-5 7 1-2-3 4 1| by two methods.

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  16. Evaluate: =|0sinalpha-cosalpha-sinalpha0sinbetacosalpha-sinbeta0|

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  17. Evaluate: =|cosalphacosbetacosalphasinbeta-sinalpha-sinbetacosbeta0sin...

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  18. If A=[2 5 2 1] and B=[4-3 2 5] , verify that |A B|=|A||B| .

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  19. If A=[[1 ,0 ,1],[0 ,1, 2],[ 0, 0, 4]] , then show that |3A|" "=" "27|...

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  20. Find the values of x , if |2 4 5 1|=|2x4 6x| (ii)|2 3 4 5|=|x3 2x5| (...

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