若m=2011/(根号2012)-1,则m^5-2m^4-2011m^3=___
1个回答
展开全部
m=2011/(根号2012-1)
=2011×(√2012+1)/(√2012-1)(√2012+1)
=2011×(√2012+1)/(2012-1)
=√2012+1
m^5-2m^4-2011m^3
=m³(m²-2m-2011)
=(√2012+1)³[(√2012+1)²-2*(√2012+1)-2011]
=(√2012+1)³(2012+2√2012+1-2√2012-2-2011)
=(√2012+1)³×0
=0
是否可以解决您的问题?
=2011×(√2012+1)/(√2012-1)(√2012+1)
=2011×(√2012+1)/(2012-1)
=√2012+1
m^5-2m^4-2011m^3
=m³(m²-2m-2011)
=(√2012+1)³[(√2012+1)²-2*(√2012+1)-2011]
=(√2012+1)³(2012+2√2012+1-2√2012-2-2011)
=(√2012+1)³×0
=0
是否可以解决您的问题?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询