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Find is the coefficient of x^(4) in the ...

Find is the coefficient of `x^(4)` in the power series expansion of `(3x^(2)+2x)/((x^(2)+2)(x-3))` specifying the interval in which the expansion is valid.

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The correct Answer is:
`:."Coefficients of "x^(4)=-(1)/(81)+(1)/(4)=(-4+81)/(324)=(77)/(324)`
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