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If D(r)=|(2^(r-1),2(3^(r-1)),4(5^(4-1)))...

If `D_(r)=|(2^(r-1),2(3^(r-1)),4(5^(4-1))),(x,y,z),(2^(n)-1,3^(n)-1,5^(n)-1)|` then `sum_(r=1)^(n)D_(r)=`

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AAKASH SERIES-MATRICES -ADDITIONAL EXERCISE
  1. If a,b,c, are in A.P. then |(x+1,x+2,x+a),(x+2,x+3,x+b),(x+3,x+4,x+c)|...

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  2. Let the three digit number A28, 3B9,62C, where A,B,C are integers betw...

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  3. If f(x)=|(1+sin^(2)x,cos^(2)x,4sin2x),(sin^(2)x,1+cos^(2)x,4sin2x),(si...

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  4. If |(x(1),y(1),1),(x(2),y(2),1),(x(3),y(3),1)|=|(a(1),b(1),1),(a(2),b(...

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  5. If a,b,c are in G.P. then find the value of |{:(a,b,ax+by),(b,c,bx+cy)...

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  6. If f(x)=|(cosx, x,1),(2sinx,x^(2),2x),(tanx,x,1)| then Lt(xto0)(f'(x))...

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  7. Find the value of |{:(sqrt(13)+sqrt(3),2sqrt(5),sqrt(5)),(sqrt(15)+sqr...

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  8. If a="cos"(4pi)/3+I"sin"(4pi)/3,then |(1,1,1),(1,a,a^(2)),(1,a^(2),a)|...

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  9. If D(r)=|(2^(r-1),2(3^(r-1)),4(5^(4-1))),(x,y,z),(2^(n)-1,3^(n)-1,5^(n...

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  10. Adj[(1,0,2),(-1,1,-2),(0,2,1)]=[(5,a,-2),(1,1,0),(-2,-2,b)]implies[(a,...

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  11. A square nonsingular matrix satisfies A^(2)-A+2I=0 then A^(-1)=

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  12. If A is 4xx4 matrix and |2A|=64,B="Adj A" then |"Adj B"|=

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  13. The value of a third order determinan t is 11 then find the value of t...

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  14. If |(x,x+y,x+y+z),(2x,3x+2y,4x+3y+2z),(3x,6x+3y,10x+6y+3z)|=64 then x=

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  15. If |(3x-8,3,3),(3,3x-8,3),(3,3,3x-8)|=0 then x=0

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  16. If a+b+c=0 and |(a-x,c,b),(c,b-x,a),(b,a,c-x)|=0 then x=

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  17. |(-a^(2),ab,ac),(ab,-b^(2),bc),(ac,bc,-c^(2))|=

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  18. Show that |{:(a,c,a+c),(a+b,b,a),(b,b+c,c):}|=4abc

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  19. Solve the system of equations 2/x+3/y+10/z=4,4/x-6/y+5/z=1,6/x+9/y-20/...

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  20. The cost of 3 kg rice, 4 kg wheat, 2 sugar is Rs. 130. The cost of 2kg...

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