Home
Class 12
MATHS
If | adj . A | =25 [A " is of order 3 ...

If `| adj . A | =25 [A " is of order 3 ] then " | A^(-1) |=`

A

`0.2`

B

`+- 5`

C

`(1)/(root(5)(625))`

D

` +-0.2`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • MATRICES

    MODERN PUBLICATION|Exercise QUESTIONS FROM KARNATAKA CET & COMED|13 Videos
  • MOCK TEST PAPER -II

    MODERN PUBLICATION|Exercise SELECT CORRECT ANSWER|60 Videos

Similar Questions

Explore conceptually related problems

If | adj A| = 25 [ A is of order 3 ] , then |A^(-1)| =

If A (adj . A ) = 81 , for a 3xx3 matrix A , then det . A is equal to :

If A (adj .A ) = 5I , where I is idensity martrix of order 3 , then |adj A | =

If |adj(A)|= 11 and A is a square matrix of order 2 then find the value of |A|

If A and B are square matrices of order 3 , such that |A| =-1 , |B | = 3 , then thee determinant of 3 AB equals :

If A is a square matrix of order 3 and |A|=8 , then |adj A| =

If A is square matrix of order 3 and |A|=4 ,then find |adj A|

If A is square matrix of order 3 and |A| = 5 then find |Adj A| .

MODERN PUBLICATION-MOCK TEST PAPER -I-SELECT THE CORRECT ANSWER
  1. If A is 3xx 3 non- singular matrix and if |A |=3 then |(2A)^(-1) |=

    Text Solution

    |

  2. If A=[(3,2),(1,1)] then A^(2)+xA+yI=0 for (x,y) =

    Text Solution

    |

  3. If | adj . A | =25 [A " is of order 3 ] then " | A^(-1) |=

    Text Solution

    |

  4. If f(x ) = {(3 sin pi x)/(5x ) underset( x=0)underset( x ne 0) is con...

    Text Solution

    |

  5. If the fucntion f (x ) satisfies underset( x to 1) (lim ) . (f (x )...

    Text Solution

    |

  6. If the three function f(x),g(x) and h(x) are such that h(x)=f(x)g(x) a...

    Text Solution

    |

  7. the derivative of e^(ax) cos bx with respect to x is re^(ax) cos...

    Text Solution

    |

  8. If x=a cos ^(3) theta and y = a sin^(3) theta then (dy)/( dx) =

    Text Solution

    |

  9. If y= tan^(-1) sqrt(x^(2)-1) then the ratio (d^(2)y)/(dx^(2)) : (dy)/...

    Text Solution

    |

  10. If sqrt(r ) =ae^(thetacotalpha) where a and alpha are real numbers the...

    Text Solution

    |

  11. P is the point of contact of the tangent from the orign to the c...

    Text Solution

    |

  12. The lengths of the sub-tangent , ordinate and the sub-normal are in

    Text Solution

    |

  13. the set of real values of x for which f(x ) = (x ) /( log x) is i...

    Text Solution

    |

  14. A wire of lenggth 20 cm is bent in the form of a sector of a circle. T...

    Text Solution

    |

  15. if int f (x ) sin x cos x dx = (1)/(2(b^(2) -a^(2)) log f(x ) + c w...

    Text Solution

    |

  16. int (sin^(-1))/(sqrt(1+x)) dx=

    Text Solution

    |

  17. int (cos^(n-1))/( sin^(n+1)) dx , n ne 0 is :

    Text Solution

    |

  18. The value of the intergral underset(0)overset(pi//2)(int) (sin^(100)...

    Text Solution

    |

  19. If [x] denote the greatest integer function , then , int(0)^(pi//6) (1...

    Text Solution

    |

  20. The area bounded by the curve : y={(x^2,x lt 0),(x,xge0):} and the...

    Text Solution

    |