消费函数:C = 145 + 0.75(Y - 60) = 100 + 0.75Y 投资函数:I = 160 - 5r,政府支出:G = 80 代入得:Y = 100 + 0.75Y + 160 -5r + 80 整理得:0.25Y = 340 -5r → Y = 1360 -20r **LM曲线推导:** 货币市场均衡条件:M = L,即240 = 0.2Y ...