(→Guess the Signal) |
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1. <math>x[n]</math> is periodic with N=8. | 1. <math>x[n]</math> is periodic with N=8. | ||
| − | 2. <math>\sum_{n=2}^{9}(-1)^{\frac{3}{4}}x[n]=4</math>. | + | 2. <math>\sum_{n=2}^{9}(-1)^{\frac{3}{4}n}x[n]=4</math>. |
3. <math>a_3=a_5</math>. | 3. <math>a_3=a_5</math>. | ||
Revision as of 12:21, 25 September 2008
Guess the Signal
1. $ x[n] $ is periodic with N=8.
2. $ \sum_{n=2}^{9}(-1)^{\frac{3}{4}n}x[n]=4 $.
3. $ a_3=a_5 $.
4. $ \sum_{k=0}^{7}a_k=1 $.
