Find coefficient of x^4 in the expansion of \frac{2+x^2}{1+x-x^2} in ascending power of x

PUNE MCA Exam 2014 Question Paper with answers for online practice

Question : 13 of 58

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Find coefficient of

x^4

in the expansion of

{2+x^2}/{1+x-x^2}

in ascending power of x

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