Question: 4. Express the sequence I n=0 3n=2 0 else (a) Express the signal as a sum of weighted and shifted unit impulse sequence. Hint: use

4. Express the sequence I n=0 3n=2 0 else (a) Express the signal as a sum of weighted and shifted unit impulse sequence. Hint: use b) Express the signal as a sum of weighted and shifted unit step sequence. Hint: use [n] = t1n]-In-1) in your answer in (a)

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