(1)设y=k/(x-0.4),代入x=0.65,y=0.8,得k=0.2,所以y=0.2/(x-0.4).
(2)上年度收益:1*(0.8-0.3)=0.5亿,则本年度收益为0.5*20%=0.6亿,
设电价为x元,列方程得:0.2/(x-0.4)*(x-0.3)=0.6,解得x=0.45.
(1)设y=k/(x-0.4),代入x=0.65,y=0.8,得k=0.2,所以y=0.2/(x-0.4).
(2)上年度收益:1*(0.8-0.3)=0.5亿,则本年度收益为0.5*20%=0.6亿,
设电价为x元,列方程得:0.2/(x-0.4)*(x-0.3)=0.6,解得x=0.45.