If any two rows or any two columns are identical or proportional, then value of determinant is ____
1
2
3
0
If elements of a row (or column)are multiplied with cofactors of any other row (or column),then their sum is ________ .
Positive
Negative
Zero
None of these
_________.
a b c
4 a b c
4 a2 b2 c2
a2 b2 c2
If ,then x is equal to
6
-6
N
2N+1
N + 2
The roots of the equation
-1, -2
-1, 2
1, -2
1, 2
The one root of the equation
- ( a+ b)
- ( b + c )
-a
- ( a + b + c )
x y z ( 1 + 1/x + 1/ y + 1/z )
x y z
1 + 1/x + 1/ y + 1/z
1/x + 1/ y + 1/z
779
679
Find value of x,if .
