Cho X ˜ ( k ) = j − 3 , hãy xác định đáp ứng biên độ và đáp ứng pha

$\left|\tilde{X}\left(k\right)\right|=\sqrt{10},\text{a}\text{r}\text{g}\left[\tilde{X}\left(k\right)\right]=\text{a}\text{r}\text{c}\text{t}\text{g}\frac{1}{-3}$

$\left|\tilde{X}\left(k\right)\right|=\sqrt{4},\text{a}\text{r}\text{g}\left[\tilde{X}\left(k\right)\right]=\text{a}\text{r}\text{c}\text{t}\text{g}\frac{1}{-3}$

$\left|\tilde{X}\left(k\right)\right|=\sqrt{3j},\text{a}\text{r}\text{g}\left[\tilde{X}\left(k\right)\right]=\text{a}\text{r}\text{c}\text{t}\text{g}\frac{1}{10}$

$\left|\tilde{X}\left(k\right)\right|=\sqrt{10},\text{a}\text{r}\text{g}\left[\tilde{X}\left(k\right)\right]=\text{a}\text{r}\text{c}\text{t}\text{g}\left(-\frac{1}{10}\right)$