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Show that matrix |(1,a,b+c),(1,b,c+a),(1...

Show that matrix `|(1,a,b+c),(1,b,c+a),(1,c, a+b)|=0`

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`=>``|(1,1,1),(a,b,c),(b+c,c+a, a+b)|`

`C_2rarrC_2-C_1`

`C_3rarrC_3-C_1`

`=>``|(1,0,0),(a,b-a,c-a),(b+c,a-b, a-c)|`

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RD SHARMA-DETERMINANTS-Solved Examples And Exercises
  1. Find the value of the determinant =|2 3 4 5 6 8 6x9x 12 x|dot

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  2. Without expanding evaluate the determinant |[41,1,5],[79,7,9],[29,5,3]...

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  3. Show that matrix |(1,a,b+c),(1,b,c+a),(1,c, a+b)|=0

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  4. Without expanding evaluate the determinant |(x^2+x^(-1))^2(a^2-a^(-1))...

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  5. If 1=|(1, 1, 1),(x^2,y^2,z^2),(x, y ,z)|a n d2=|(1 ,1, 1),(y z, z x,x ...

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  6. Without expanding show that |[b^2c^2,b c, b+c],[c^2a^2,c a ,c+a ],[a^2...

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  7. Without expanding evaluate the determinant |[sinalpha,cosalpha,sin(alp...

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  8. If A+B+C=pi, then the value of |[sin(A+B+C),sin(A+C),cosC],[-sinB,0...

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  9. If Ar=|[1,r,2^r],[2,n,n^2],[n,(n(n+1))/2, 2^(n+1)]|, the value of sum(...

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  10. If the determinant |[a,b,2aalpha+3b],[b,c,2balpha+3c],[2aalpha+3b,2bal...

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  11. If a , b , c are distinct, then the value of x satisfying |(0,x^2-a, x...

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  12. Using the factor theorem it is found that a+b , b+c and c+a are thr...

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  13. Let |(x^2+3x,x-1,x+3),(x+1,-2x x-4),(x-3,x+4 ,3x)|=a x^4+b x^3+c x^2+e...

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  14. If Dk=|[1,n,n],[2k,n^2+n+2,n^2+n],[2k-1,n^2,n^2+n+2]| and sum(k=1)^...

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  15. If Delta1=|(1, 1, 1),(a, b, c),( a^2,b^2,c^2)|,Delta2=|(1,bc, a),(1,ca...

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  16. The value of the determinant |(a^2,a,1),(cosn x,cos(n+1)x,cos(n+2)x),(...

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  17. Evaluate: (i) |(5 ,4),(-2, 3)| (ii) |(sintheta,costheta),(-costheta,s...

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  18. Evaluate: (i) |(x^2+x y+y^2,x+y ),(x^2-x y+y^2,x-y)| (ii) |(1,(log)b ...

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  19. Evaluate D =|[2, 3,-2],[ 1, 2, 3],[-2, 1,-3]| by expanding it along th...

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  20. Evaluate the determinant D=|2 3-2 1 2 3-2 1-3| by expanding it alon...

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