The equation of the waveform in terms of unit step functions

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The equation of the waveform in terms of unit step functions can be written as—

1. u (t – 1) + u (t –2) + u (t – 3) + u (t – 4) – 4 u (t – 5)
2. u (t + 1) + 4 (t + 2) + 4 (t + 3) + 4 (t + 4) – 4 (t – 5)
3. u (t – 1) – u (t – 2) + 44 (t – 5)
4. None of the above.

Correct Option: A

The given waveform can be written as the combination of 5 waveform.

so, V = V₁ + V₂ + V₃ + V₄ + V₅
V = u (t – 1) + u (t – 2) + u (t – 3) + u (t – 4) – 4 u (t – 5)