If 1-x4 - x2 - 1 - Ax - B-x2 - x - 1 - Cx - D-x2 - x - 1- then C - D -

The correct option is D 0 Ax+B(x^2+1)+x+Cx+D(x^2+1) x =Ax(x^2+1 x)+B(x^2+1 x)+Cx(x^2+1+x)+D(x^2+1+x)(x^2+1)^2 x^2 =x^3(A+C)+x^2(C+D+B A)+x(A B+C+ ...

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Common Roots

If 1/x4 + x...

Question

If $\frac{1}{x^{4} + x^{2} + 1} = \frac{A x + B}{x^{2} + x + 1} + \frac{C x + D}{x^{2} - x + 1}$ , then $C + D =$

-1

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A =

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