99 Percentile Qs Bank for JEE MainMathematicsDeterminants
If f(x)= | array ccc 2 x & 1 & 0 x- 2 & 2 x & 1 0 & 1 & 2 x array | then f^ ( ) is equal to
Options
- A0
- B2
- C2
- D-6
Correct answer
B. 2
Step-by-step solution
f(x)= | array ccc 2 x & 1 & 0 x- 2 & 2 x & 1 0 & 1 & 2 x array |f^ (x)= | array ccc -2 x & 1 & 0 1 & 2 x & 1 0 & 1 & 2 x array |+ | array ccc 2 x & 0 & 0 x- 2 & -2 x & 1 0 & 0 & 2 x array |+ | array ccc 2 x & 1 & 0 x- 2 & 2 x & 0 0 & 1 & -2 x array |f^ ( )= | array ccc -2 & 1 & 0 1 & 2 & 1 0 & 1 & 2 array |+ | array ccc 2 & 0 & 0 - 2 & -2 & 1 0 & 0 & 2 array |+ | array ccc 2 & 1 & 0 - 2 & 2 & 0 0 & 1 & -2 array |f^ ( )= | array rrr 0 & 1 & 0 1 & -2 & 1 0 & 1 & -2 array |+ | array ccc -2 & 0 & 0 / 2 & 0 & 1 0 & 0 &