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If D=|{:(2,3,1),(5,-1,2),(7,4,-1):}| , p...

If `D=|{:(2,3,1),(5,-1,2),(7,4,-1):}|` , performing `R_(12(-1)` on D then D will become ….

A

`|{:(-1,3,1),(6,-1,2),(3,4,-1):}|`

B

`|{:(2,1,1),(5,-6,2),(7,-3,-1):}|`

C

`|{:(-3,4,-1),(5,-1,2),(7,4,-1):}|`

D

`|{:(2,3,1),(3,-4,1),(7,4,-1):}|`

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KUMAR PRAKASHAN-DETERMINANTS -Textbook based MCQs
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  2. If A is a square matrix and A^2=A" then |A|=……..

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  3. |{:(a,-b,a-b),(b,c,b-c),(2,1,0):}|=0 then a,b,c are in …………..

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  4. |{:(2,3,4),(4x,6x,8x),(5,7,8):}|=......

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  5. The value of |{:(2008,2009),(2010,2011):}| is …..

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  6. |{:(x,1,y+z),(y,1,z+x),(z,1,x+y):}|=.......

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  7. |{:(sin40^@,-cos40^@),(sin50^@,cos50^@):}|=.......

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  8. If D=|{:(2,3,1),(5,-1,2),(7,4,-1):}| , performing R(12(-1) on D then D...

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  9. |{:(5^2,5^3,5^4),(5^1,5^2,5^3),(5^3,5^4,5^4):}|=.......

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  10. If D1=|{:(1,yz,x),(1,zx,y),(1,xy,z):}|and D2=|{:(1,1,1),(x,y,z),(x^2,y...

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  11. If ane0,bne0,cne0 and |{:(0,x^2+a,x^4+b),(x^2-a,0,x-c),(x^3-b,x^2+c,0)...

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  12. If x,y,z in R. xgtygtz and D= |{:((x+1)^2,(y+1)^2,(z+1)^2),(x,y,z),(...

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  13. If A = [( 1, cos theta , 1,),( - cos theta ,1,cos theta ),( -1 , - cos...

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  14. If |{:(a,b,ax+by),(b,c,bx+cy),(ax+by,bx+cy,0):}|=0 and ax^2+2abxy+cy^2...

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  15. If |{:(1,2,5),(1,x,5),(3,-1,2):}|=0 then x = ………

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  16. Solve that |{:(1+x,1-x,1-x),(1-x,1+x,1-x),(1-x,1-x,1+x):}|=0

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  17. If |{:(x,-6,-1),(2,-3x,x-3),(-3,2x,x+2):}|=0 then x = ……..

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  18. |{:(sqrt(14)+sqrt3,sqrt(20),sqrt5),(sqrt(15)+sqrt(28),sqrt(25),sqrt(10...

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  19. If |{:(a,b,ax+b),(b,c,bx+c),(ax+b,bx+c,0):}|'=0 then "a,b,c are in" .....

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  20. |{:(sin35^@,-cos35^@),(sin55^@,cos55^@):}|=.........

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