InterviewSolution
Saved Bookmarks
| 1. |
If(2x ^ 3+x ^ 2- 5 ) /( x ^4-25 )=(Ax +B)/( x ^ 2- 5 )+(Cx + 1 ) /( x ^ 2+5 ),then(A, B, C)equalsto |
|
Answer» ` (1, 1, 1 ) ` ` rArr(Ax + B )(x ^ 2+5 )+(x + 1 )(x ^ 2- 5 )=2X ^ 3+x ^ 2- 5 ` ` rArr A + C = 2 , 5B - 5 =- 5 ` ` 5A - 5C =0 rArr B =0 ` ` rArrA = C ` `thereforeA = C = 1` `therefore( A, B, C )=(1, 0, 1 ) ` |
|