1
GATE CSE 2001
+1
-0.3
Consider the following statements:
S1: The sum of two singular n x n matrices may be non-singular
S2: The sum of two n x n non-singular matrices may be singular

Which of the following statements is correct?

A
S1 and S2 are both true
B
S1 is true, S2 is false
C
S1 is false, S2 is true
D
S1 and S2 are both false
2
GATE CSE 2000
+1
-0.3
The determinant of the matrix $$\left[ {\matrix{ 2 & 0 & 0 & 0 \cr 8 & 1 & 7 & 2 \cr 2 & 0 & 2 & 0 \cr 9 & 0 & 6 & 1 \cr } } \right]\,\,is$$\$
A
4
B
0
C
15
D
20
3
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
$${n^2}\,(n\, + \,1)/2$$
4
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
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