SCALCET$97.XP\mathrm{.}4\mathrm{.}005.$

Write out the general form $of$ the partial fraction decomposition $of$ the function $(asin$ Example $7).Do$ not determine the numerical values $of$ the constants.

$(a)\frac{x^4-2x^3+x^2+6x-1}{x^2-2x+1}$

$(b)\frac{x^2-1}{x^3+x^2+x}$

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SCALCET$97\mathrm{.}7\mathrm{.}030.$