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The equations 2x-3y+6z=4, 5x+7y-14z=1 3x...

The equations `2x-3y+6z=4, 5x+7y-14z=1 3x+2y-4z=0,` have

A

unique solutions

B

no solution

C

infinite many

D

None of these

Text Solution

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The correct Answer is:
B
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ML KHANNA-MATRICES-PROBLEM SET(1) (MULTIPLE CHOICE QUESTIONS)
  1. If F(alpha)=[(cos alpha, -sin alpha, 0),(sin alpha, cos alpha, 0),(0,0...

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  2. If [(1,-tan theta),(tan theta,1)][(1,tan theta),(-tan theta,1)]^(-1)=[...

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  3. Which of the following the following is correct?

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  4. If A be a skew symmetric matrix of odd order, then |A| is equal to

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  5. If A be a skew symmetric matrix of even order then |A| is equal to

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  6. If A=[(1,0),(1//2,1)] then A^(50) is

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  7. If A=[(a,0,0),(0,a,0),(0,0,a)] then A^(n)=

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  8. If P=[[sqrt(3)/2,1/2],[-1/2,sqrt(3)/2]], A=[[1,1],[0,1]] and Q=PAP^T, ...

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  9. If A=[(1,2,-1),(-1,1,2),(2,-1,1)] then det [adj(adjA)]=

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  10. The equations x+2y+3z=1, 2x+y+3z=2,5x+5y+9z=4 have

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  11. The equations 2x-3y+6z=4, 5x+7y-14z=1 3x+2y-4z=0, have

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  12. x+y+z=6 x-y+z=2 2x+y-z=1 then x,y,z are respectively

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  13. The value of a fro which the system of equations ax+by+z=0,x+ay+z=0,x+...

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  14. There are two column vectors X=((x),(1)) and ((1,4),(5,2)) X is parall...

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  15. Let A be the set of all 3xx3 symmetric matrices all of whose entries a...

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  16. Let A be the set of all 3xx3 symmetric matrices all of whose either 0 ...

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  17. Let A be the set of all 3xx3 symmetric matrices all of whose either 0 ...

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  18. A=[(2,0,1),(1,1,0),(1,0,1)],AU(1)=[(1),(0),(0)](3xx1)'AU(2)=[(2),(3),(...

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  19. A=[(2,0,1),(1,1,0),(1,0,1)],AU(1)=[(1),(0),(0)](3xx1)'AU(2)=[(2),(3),(...

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  20. If A= ((1,0,0),(2,1,0),(3,2,1)), U(1), U(2), and U(3) are column matri...

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