Recent questions tagged applications of matrices and determinants

+3 votes

1 answer

Let A be a non-singular matrix of the order 2 x 2 then |A^-1| = (a) |A| (b) 1/|A| (c) 0 (d) 1

asked Apr 7, 2019 in Class 12 by kratos

+3 votes

1 answer

Using matrices, solve the following system of equations : x + 2y - 3z = - 4, 2x + 3y + 2z = 2, 3x - 3y - 4z = 11

asked Mar 31, 2019 in Class 12 by kratos

+2 votes

1 answer

By using elementary transformations, find the inverse of the matrix A = [(1, 2), (2, -1)]

asked Mar 31, 2019 in Class 12 by kratos

+1 vote

1 answer

C is the centrec, AA' and BB' are major and minor axis of the ellipse. x^2/a^2 + y^2/b^2 = 1. If PN is the ordinate of a

asked Mar 31, 2019 in JEE by kratos

+2 votes

1 answer

Let A be a non-singular matrix of the order n × n then the |adj A| is equal to which of the following ?

asked Mar 29, 2019 in Class 12 by kratos

+1 vote

1 answer

Use product [(1,-1,2),(0,2,-3),(3,-2,4)][(-2,0,1),(9,2,-3),(6,1,-6)] to solve the system of equations :

asked Mar 29, 2019 in Class 12 by kratos

+3 votes

1 answer

Solve the following system of equation by method: x + 2y + 3z = 2; 2x + 3y + z = -1 and x – y – z = -2

asked Mar 28, 2019 in Class 12 by kratos

+2 votes

1 answer

What is the value of a so that the equations ax + 2y + 3z = 0, 2x - 3y + 4z = 0, and 5x + 7x - 8z = 0 may be simultaneously true ?

asked Mar 28, 2019 in Class 12 by kratos

+1 vote

1 answer

If A and B are square matrices of order 3 × 3, where |A| = 2 and |B| = – 3, then |(A^–1) . adj (B^–1) . adj (2A^–1)| =

asked Mar 23, 2019 in JEE by kratos

+2 votes

1 answer

The equations two circles are x^2 + y^2 + λx + c = 0 and x^2 + y^2 + µx + c = 0. Prove that

asked Mar 15, 2019 in JEE by kratos

+2 votes

1 answer

The values of 'λ' for which the system of equations

asked Mar 11, 2019 in JEE by kratos

+2 votes

1 answer

Solve y - 6y' + 9y = 0

asked Mar 9, 2019 in JEE by kratos

+3 votes

1 answer

Using matrix solve the following system of equations : x + y + z = 6 2x + y - 3z = - 5 3x - 2y + z = 2

asked Mar 3, 2019 in Class 12 by kratos

+1 vote

1 answer

If A = [(3,2,1)(4,-1,2)(7,3,-3)],then find A^-1 and hence solve the following system of equations : 3x+4y+7z = 14. 2x-y+3z = 4. x+2y-3z = 0

asked Feb 28, 2019 in JEE by kratos

+2 votes

1 answer

यदि Δ = |(a11, a12, a13), (a21, a22, a23), (a31, a32, a33)| और aij का सहखण्ड Aij हो तो Δ का मान निम्नलिखित रूप में व्यक्त किया जाता है–

asked Feb 27, 2019 in Class 12 by kratos

+1 vote

1 answer

If both roots of quadratic equation 2x^2 + λx – (λ + 1) = 0 are greater than 1 then λ **** completely in intervel

asked Feb 27, 2019 in JEE by kratos

+2 votes

1 answer

Inverse of a matrix

asked Feb 27, 2019 in Class 12 by kratos

+3 votes

1 answer

Which of the following equations have no real solutions ?

asked Feb 24, 2019 in Class 12 by kratos

+1 vote

1 answer

Find the angle between the line x+1/2=3y+5/9=3-z/-6 and the plane 10x + 2y - 11z = 3.

asked Feb 22, 2019 in Class 12 by kratos

+3 votes

1 answer

A = [(2,-1,1)(-1,2,-1)(1,-1,2)], then verify that A^3- 6A^2+9A-4I = 0 and hence find.A^-1.

asked Feb 18, 2019 in Class 12 by kratos

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