1
GATE CSE 2000
+1
-0.3
An $$n\,\, \times \,\,n$$ array v is defined as follows v[i, j] = i - j for all i, j, $$1\,\, \le \,\,i\,\, \le \,\,n,\,1\,\, \le \,\,j\,\, \le \,\,n$$ The sum of elements of the array v is
A
0
B
n - 1
C
$${n^2}\, - \,3n\, + \,2$$
D
$${n^2}\,(n\, + \,1)/2$$
2
GATE CSE 1998
+1
-0.3
Consider the following set a equations
x + 2y = 5
4x + 8y = 12
3x + 6y + 3z = 15 This set
A
has a unique solution
B
has no solutions
C
has finite number of solutions
D
has infinite number of solutions
3
GATE CSE 1997
+1
-0.3
The determination of the matrix $$\left[ {\matrix{ 6 & { - 8} & 1 & 1 \cr 0 & 2 & 4 & 6 \cr 0 & 0 & 4 & 8 \cr 0 & 0 & 0 & { - 1} \cr } } \right]\,\,is$$\$
A
11
B
- 48
C
0
D
- 24
4
GATE CSE 1996
+1
-0.3
Let AX = B be a system of linear equations where A is an m x n matrix and B is a $$m\,\, \times \,\,1$$ column vector and X is a n x 1 column vector of unknowns. Which of the following is false?
A
The system has a solution if and only if, both A and the augmented matrix [A B] have the same rank.
B
If m < n and B is the zero vector, then the system has infinitely many solutions.
C
If m = n and B is a non zero vector, then the system has a unique solution.
D
The system will have only a trivial solution when m = n, B is the zero vector and rank (A) = n
GATE CSE Subjects
EXAM MAP
Medical
NEET