Maths-
General
Easy
Question
If A is an involuntary matrix given byA =
then the inverse of
will be
- 2A
- A2
The correct answer is: 2A
A2 = I (given A is involutory)
So A. A = I
. 2A = I
Related Questions to study
maths-
Matrix A =
, If xyz = 60 and 8x + 4y + 3z = 20, then A(adj A) is equal to:
Matrix A =
, If xyz = 60 and 8x + 4y + 3z = 20, then A(adj A) is equal to:
maths-General
Maths-
Let A =
. If U1, U2, U3 are column matrices satisfying AU1 =
, AU2 =
, AU3 =
and U is 3 × 3 matrix whose columns are U1, U2 and U3. Then |U| =
Let A =
. If U1, U2, U3 are column matrices satisfying AU1 =
, AU2 =
, AU3 =
and U is 3 × 3 matrix whose columns are U1, U2 and U3. Then |U| =
Maths-General
maths-
If the matrix A =
is singular, then λ equal to -
If the matrix A =
is singular, then λ equal to -
maths-General
maths-
If AB = I and B = A' then :
If AB = I and B = A' then :
maths-General
maths-
If A and B are square matrices of same size and |B|
0, then (B–1 AB)4 =
If A and B are square matrices of same size and |B|
0, then (B–1 AB)4 =
maths-General
maths-
If B is non-singular matrix and A is a square matrix of same size, then det (B–1 AB) =
If B is non-singular matrix and A is a square matrix of same size, then det (B–1 AB) =
maths-General
maths-
If A satisfies the equation x3 – 5x2 + 4x + k = 0, then A–1 exists if -
If A satisfies the equation x3 – 5x2 + 4x + k = 0, then A–1 exists if -
maths-General
Maths-
If 3A =
and A is orthogonal, then x + y =
If 3A =
and A is orthogonal, then x + y =
Maths-General
maths-
If A, B are symmetric matrices of the same order then (AB – BA) is -
If A, B are symmetric matrices of the same order then (AB – BA) is -
maths-General
maths-
If A =
is symmetric, then x =
If A =
is symmetric, then x =
maths-General
Maths-
If the rank of the matrix
is 2 then
If the rank of the matrix
is 2 then
Maths-General
Maths-
If A =
, then AT + A = I2, if –
If A =
, then AT + A = I2, if –
Maths-General
maths-
If A =
and B =
, then value of
for which A2 = B is:
If A =
and B =
, then value of
for which A2 = B is:
maths-General
chemistry-
Which of the following has no action with starch solution?
Which of the following has no action with starch solution?
chemistry-General
Maths-
Let three matrices A =
; B =
and C =
then tr(A) + tr
+ tr
+ tr
+ ....... +
=
Let three matrices A =
; B =
and C =
then tr(A) + tr
+ tr
+ tr
+ ....... +
=
Maths-General