Answers

2014-06-30T17:40:16+05:30
The answer is   - 4.
When you divide x^4-2x^3+3x^2-ax-b  by  x-1 (try it)    you get the remainder -(a+b)+2.
Since the remainder is already given as 6,
                             Therefore,     -(a+b)+2=6
                          which gives       (a+b)=  - 4
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