1.

Resolve `(1)/(x^(4)-3x^(2)-4)` into partical fractions.A. `(1)/(5(x^(2)-4))+(1)/(5(x^(2)+1))`B. `(1)/(5(x^(2)-4))-(1)/(5(x^(2)+1))`C. `(1)/(4(x^(2)+4))-(1)/(4(x^(2)+1))`D. `(1)/(4(x^(2)+4))+(1)/(4(x^(2)+1))`

Answer» `(1)/(x^(4)-3x^(2)-4)=(Ax+B)/(x^(2)-4)+(Cx+D)/(x^(1)+1)`.


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