(See Figure 3.1) When K rises from

(See Figure 3.1) When K rises from 5 to 6 trillion, ΔK=1 trillion. With this increase in K, output increases 0.5 trillion, ΔY=0.5 trillion. The marginal product of capital = the slope of production function = ΔY/ΔK = 0.5Look at ΔY/ΔK = 0.3 when K rises from 9 to 10 trillion ΔY/ΔK decreases when K increases

結果 (繁體中文) 1:

（見圖3.1）當K從5兆上升到6兆時，ΔK=1兆。隨著 K 的增加，產量增加 0.5 兆，ΔY=0.5 兆。資本的邊際產量 = 生產函數的斜率 = ΔY/ΔK = 0.5看當 K 從 9 上升到 10 兆時 ΔY/ΔK = 0.3 當 K 增加時 ΔY/ΔK 會減少

結果 (繁體中文) 2:

（見圖3.1）當K從5萬億上升到6萬億時，ΔK=1萬億。 隨著K的新增，產量新增0.5萬億，ΔY=0.5萬億。 資本的邊際乘積=生產函數的斜率=ΔY/ΔK=0.5
當K從9萬億新增到10萬億時，ΔY/ΔK=0.3

結果 (繁體中文) 3:

(見圖3.1)當K從5上昇到6萬億時，δK = 1萬億。隨着K的增加，産量增加0.5萬億，δY = 0.5萬億。資本的邊際産量=生産函數的斜率=δY/δK = 0.5
看一下當K從9上昇到10萬億時δY/δK = 0.3當K增加時δY/δK減小