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IF 3/((x-1)(x^2+x+1))=1/(x-1)-(x+2)/(x^2+x+1)=f_1(x)-f_2(x)and-(x+1)/((x-1)^2(x^2+x+1))=Af_1(x)+(B+D/(x-1)) f_2(x)=C/(x-1)^2,A+B+C+D= |
| Answer» ANSWER :C | |