1
y=k/(x-0.4) x=6.5 y=0.8 k=0.2
函数:y=1/(5x-2)
2.
去年收益=(0.8-0.3)*1=0.5 今年收益=0.5*(1+20%)=0.6
(x-0.3)*(1+y)=0.6 y=1/(5x-2)
(x-0.3)(5x-1)=0.6*(5x-2)
5x^2-5.5x+1.5=0
x=0.5 (舍去)x=0.6
所以x=0.6
1
y=k/(x-0.4) x=6.5 y=0.8 k=0.2
函数:y=1/(5x-2)
2.
去年收益=(0.8-0.3)*1=0.5 今年收益=0.5*(1+20%)=0.6
(x-0.3)*(1+y)=0.6 y=1/(5x-2)
(x-0.3)(5x-1)=0.6*(5x-2)
5x^2-5.5x+1.5=0
x=0.5 (舍去)x=0.6
所以x=0.6