1道数学题
已知(m^2)+m-1=0,求(2m^3)+(4m^2)+2006的值
参考答案:m^2 + m = 1
所以:
m^3 + m^2 = m
所以:
2m^3 + 4m^2 + 2006
= (2m^3 + 2m^2) + 2m^2 + 2006
= 2m + 2m^2 + 2006
= 2 + 2006
= 2008
已知(m^2)+m-1=0,求(2m^3)+(4m^2)+2006的值
参考答案:m^2 + m = 1
所以:
m^3 + m^2 = m
所以:
2m^3 + 4m^2 + 2006
= (2m^3 + 2m^2) + 2m^2 + 2006
= 2m + 2m^2 + 2006
= 2 + 2006
= 2008