若m=√2012-1分之2011,则m五次方-2m4次方-2011m请快点,
问题描述:
若m=√2012-1分之2011,则m五次方-2m4次方-2011m请快点,
答
m=2011/(√2012-1)=2011*(√2012+1)/[(√2012-1)*(√2012+1)] =√2012+1 故有m-1=√2012 (m-1)^2=2012 则m^5-2m^4-2011m^3 =m^3*(m^2-2m-2011) =m^3*[(m-1)^2-2012] =m^3*(2012-2012) =0采纳哦