9. Which of the following statements are true? (A)The firm's profit is concave in the vector w (B)The firm's profit is convex in the vector w (C)The firm's profit is both concave and convex in the vector w (D)The firm's profit is neither concave nor convex in the vector w

2. 右側 switch 敘述程式碼可以如何以 if-else 改寫？(A) if (x==10) y = 'a'； if (x==20 || x==30) y = 'b'； y = 'c'；(B) if (x==10) y = 'a'； else if (x==20 || x==30) y = 'b'； else y = 'c'；(C) if (x==10) y = 'a'； if (x＞=20 && x＜=30) y = 'b'； y = 'c'；(D) if (x==10) y = 'a'； else if(x＞=20 && x＜=30) y = 'b'； else y = 'c'；

9. Which of the following statements are true? (A)The firm's profit is concave in the vector w (B)The firm's profit is convex in the vector w (C)The firm's profit is both concave and convex in the vector w (D)The firm's profit is neither concave nor convex in the vector w

其他試題

9. Which of the following statements are true?
(A)The firm's profit is concave in the vector w
(B)The firm's profit is convex in the vector w
(C)The firm's profit is both concave and convex in the vector w
(D)The firm's profit is neither concave nor convex in the vector w