4. (5%) FX(x) is a cumulative distribution function (cdf). Is it true that FX(∞) = 1? (Answer yes or no).

1. (10%) 請使用 Gauss-Jordan Elimination 來求出(1)中 A 的 inverse matrix，也就是求 $A^{-1}$。請將計算過程寫出，沒有計算過程不計分。 $$A = \begin{bmatrix} 1 & 1 & 1 & 1 \\ 1 & 2 & 2 & 1 \\ 1 & 2 & 3 & 4 \\ 3 & 3 & 1 & 1 \end{bmatrix} \tag{1}$$

4. (5%) F_X(x) is a cumulative distribution function (cdf). Is it true that F_X(∞) = 1? (Answer yes or no).

相關申論題

相關試卷