AP EAMCET2001MathematicsMatrices
If A= [ array cc 0 & 2 3 & -4 array ], h A= [ array cc 0 & 3 a 2 b & 24 array ] , then the values of h, a, b are respectively
Options
- A-6,-12,-18
- B-6,4,9
- C-6,-4,-9
- D-6,+12,18
Correct answer
C. -6,-4,-9
Step-by-step solution
We have, aligned A & = [ array cc 0 & 2 3 & -4 array ] h A & = [ array cc 0 & 2 h 3 h & -4 h array ]= [ array cc 0 & 3 a 2 b & 24 array ] aligned On comparing the corresponding elements, aligned & 3 a=2 h & a= 2 h 3 & 3 h=2 b & b= 3 h 2 & and -4 h=24 h=-6 & a=-4, b=-9 & aligned