Question

已知m+m分之一=3,求m的4次方+m的4次方分之一

Answer 1

(m+m分之1）²=m²+2+m²分之1=3²=9
m²+m²分之1=9-2=7

（m²+m²分之1）²=m的4次方+2+m的4次方分之1=7²=49

m的4次方+m的4次方分之一=49-2=47

望采纳

Answer 2

m+1/m=3平方
(m+1/m)^2=9
m^2+1/m^2+2=9
m^2+1/m^2=7平方
(m^2+1/m^2)^2=49
m^4+1/m^4+2=49
m^4+1/m^4=47

Answer 3

me too 我也一样