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  • Search Results for 'An=43n�2n3n Example3.considertherecurrencerelationan=2an�1�2an�2(4)withinitialconditionsa0=1anda1=3.thecharacteristicequationiss2�2s 2=(s�1)2 1=0:wehavetwocomplexconjugaterootss1=1 Iands1=1�i.inpolar'