104/(1+x)+54/(1+x)^2+32/(1+x)^3=200
104/(1+x)+54/(1+x)^2+32/(1+x)^3=200
日期：2022-04-01 02:03:26 人气：1
令 1/(1+x) = m 则：
5m +4m^2 + 3m^3+m^4 = 10
m(m³ + 3m² +4m + 5 ) = 10
m [ (m+1)³ + m +4 ] =10
m [ (m+1) (m²+2m+2) +3 ] = 10
往下,我也不会了!
5m +4m^2 + 3m^3+m^4 = 10
m(m³ + 3m² +4m + 5 ) = 10
m [ (m+1)³ + m +4 ] =10
m [ (m+1) (m²+2m+2) +3 ] = 10
往下,我也不会了!