1
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A square matrix A is called orthogonal, if
where A' is the transpose of A
where A' is the transpose of A
2
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If A and B are two invertible square matrices of same order, then what is (AB)$$-$$1 equal to?
3
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following in respect of matrices A, B and C of same order.
1. (A + B + C)' = A' + B' + C'
2. (AB)' = A' B'
3. (ABC)' = C' B' A'
Where, A' is the transpose of the matrix A. Which of the above are correct?
1. (A + B + C)' = A' + B' + C'
2. (AB)' = A' B'
3. (ABC)' = C' B' A'
Where, A' is the transpose of the matrix A. Which of the above are correct?
4
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following in respect of matrices A and B of same order.
1. A2 $$-$$ B2 = (A + B) (A $$-$$ B)
2. (A $$-$$ I) (I + A) = O $$ \Leftrightarrow $$ A2 = I
where, I is the identity matrix and O is the null matrix.
Which of the above is/are correct?
1. A2 $$-$$ B2 = (A + B) (A $$-$$ B)
2. (A $$-$$ I) (I + A) = O $$ \Leftrightarrow $$ A2 = I
where, I is the identity matrix and O is the null matrix.
Which of the above is/are correct?
Questions Asked from Matrices (Marks 2.5)
Number in Brackets after Paper Indicates No. of Questions
NDA Subjects
Mathematics
Algebra
Sets, Relations and Functions Logarithms Quadratic Equations and Inequalities Sequence And Series Binomial Theorem Matrices Determinants Permutations and Combinations Probability Complex Numbers Vector Algebra Three Dimensional Geometry Statistics
Trigonometry
Trigonometric Angles and Equations Inverse Trigonometric Function Height and Distance Properties of Triangles
Coordinate Geometry
Calculus
English
General Studies