Practice Problems

Introduction | Energy and Power | Basic Operations | Practice Problems | Transformation of signals defined piecewise | Even and Odd Signals | Commonly encountered signals |

### Problem 1

Given a signal $x(t)$ as shown in Figure.Perform the following and plot $y(t)$.

1. $y(t)=x(3t-2)$

2. $y(t)=x(-3t+2)$

3. $y(t)=x(\frac{3t+4}{5})$

**Solution:**

### Problem 2

Let $x(t)$ be a signal with $x(t)=0$ when $t<3$.

1. $x(1-t)+x(2-t)$

2. $x(1-t)*x(2-t)$

3. $x(3t)$

4. $x(t/3)$

For each of these signals find the value of '$t$' such that the signal is guaranteed to be zero.

**Solution:**

1. For $t>-1$ the signal is zero.

2. For $t>-2$ the signal is zero

3. For $t>1$ the signal is zero

4. For $t>9$ the signal is zero

page revision: 3, last edited: 25 Jan 2017 17:46