已知:㎡-5m-1=0,求:2㎡-5m+1/㎡明天老师上课要问最迟后天请回答
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 20:00:40
![已知:㎡-5m-1=0,求:2㎡-5m+1/㎡明天老师上课要问最迟后天请回答](/uploads/image/z/13030075-19-5.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%9A%E3%8E%A1-5m-1%3D0%2C%E6%B1%82%EF%BC%9A2%E3%8E%A1-5m%2B1%2F%E3%8E%A1%E6%98%8E%E5%A4%A9%E8%80%81%E5%B8%88%E4%B8%8A%E8%AF%BE%E8%A6%81%E9%97%AE%E6%9C%80%E8%BF%9F%E5%90%8E%E5%A4%A9%E8%AF%B7%E5%9B%9E%E7%AD%94)
xJ@_'?\2X!ɣt .`R ZE]I*LiT] s{&>U?sD-DiHJ0?.Zm6r>G`]zi+z~RY7o'irM__7цV*&2{/lT}w HS"!"cHbHws
UP6<3L%)IDǾCb^[Lk_/T5,UiRSadx
9Cu&,rU~h b$
uô| K4gyOQuh&Bhdx^0o
ט
已知:㎡-5m-1=0,求:2㎡-5m+1/㎡明天老师上课要问最迟后天请回答
已知:㎡-5m-1=0,求:2㎡-5m+1/㎡
明天老师上课要问
最迟后天请回答
已知:㎡-5m-1=0,求:2㎡-5m+1/㎡明天老师上课要问最迟后天请回答
㎡-5m-1=0,
㎡=5m+1
㎡-5m-1=0
用公式法解得
m=5+√5^2-4*1*(-1)/2=5+√29/2
或m=5-√5^2-4*1*(-1)/2=5-√29/2
2㎡-5m+1/㎡
=㎡+㎡-5m+1/㎡
=5m+1+㎡-5m+1/㎡
=㎡+2/㎡
=1+2/㎡
=1+2/(5m+1)
(1)当m=5+√29/2
原式=1+2/(5m+1)
=1+2/(5(5+√29/2)+1)
=1+4/(25+5√29+2)
=1+4/(27+5√29)
=1+4(27-5√29)/(27^2-(5√29)^2)
=1+4(27-5√29)/(27^2-25*29)
=1+4(27-5√29)/(27^2-(27-2)(27+2))
=1+4(27-5√29)/(27^2-27^2+2^2)
=1+4(27-5√29)/4
=1+27-5√29
=28-5√29
(2)当m=5-√29/2
原式=1+2/(5m+1)
=1+2/(5(5-√29/2)+1)
=1+4/(25-5√29+2)
=1+4/(27-5√29)
=28+5√29
已知m*m+m-1=0,求m*m*m+2m*m-2005
已知m^2-5m+1=0,求m^3+1/m^3 和m-1/m的值
已知m^2-5m-1=0,求(m^4+1)/m^2的值
已知m²-5m-1=0,求2m²-5m+m²/1=?已知m²-5m-1=0,求2m²-5m+1/m²=?
已知m^2-5m-1=0,求2m^2-5m+(1/m)这道题能做吗
已知m²-5m-1=0,求2m²-5m+1/m²=?
已知,m²-5m-1=0,求2m²-5m+1/m²的值.
已知m^2-5m-1=0,求3m^2-10m+1/m^2
已知m²-5m-14=0,求(m-1)(2m-1)-(m+1)²+1的值
已知m^2+m-1=0,求代数式m^3+5m^2+3m-2012的值
已知m^2+m-1=0,求m^3+5m^2+3m-2009的值.
已知2m-5n=0,求(1+n/m-m/m-n)/(1-n/m-m/m+n)的值
已知2m-5n=0,求(1+m分之n-m-n分之m)/(1-m分之n-m+n分之m)的值
已知2㎡-1=-m,求2×m∧3+5㎡+m的值
已知m的平方+m-1=0,求m³+2㎡+2009=? 急!
已知m²-7m+1=0求m²+m-²-5的值
已知㎡-5m-1=0,求m^4+1/㎡的值速求
已知m²-5m-1=0,求2m²-5,+1/m²的值