二、1. 請根據下列的邊際成本函數，求出總成本函數也就是它們的不定積分: (a) dx x x x  4 3  2 C(x)= 3 (5 分)

三、A firm produces a product to sell in a competitive market using capital and labor. Given the production function Y=f(K,L)=KαLβ where Y is output, K is capital input and L is labor input. Suppose that p, r and w are prices of output (Y), capital (K) and labor (L), respectively. Assume that p, r, w are exogeneous and α>0 and β>0 and α+β