hi guys it's me you helped me last time in my bonus problem(thank's for that) i need help again naw please it's a two marks bonus problem:(adsbygoogle = window.adsbygoogle || []).push({});

solve using power series:

(x^2)(y")+y=0

after solving it i stoped at :

an[n^2-n+1]=0

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# I need help in a bonus problem

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