当多项式m的平方+m-1=0 求值:m的3次方+2m的平方+2000
人气:336 ℃ 时间:2019-11-07 17:18:45
解答
m^2+m-1=0
m^2=1-m
m的3次方+2m的平方+2000
=m^3+2m^2+2000
=m(1-m)+2m^2+2000
=m^2+m+2000
=1-m+m+2000
=2001
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