The unit step of the ramp is

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The unit step of the ramp is—

1. u (t – 4) + u (t – 3)
2. 2 [u (t – 3) – u (t – 4)]
3. 2 (t – 3) {u (t – 3) – u (t – 4)}
4. – 2 {u (t – 3) – u (t – 4)}

Correct Option: C

The ramp falls from value of 2 at t = 3 to 0 at t = 4. The function (4 – t) goes from 1 to 0 in this interval and hence or 2 (t – 3) satisfies the given requirement. Thus, f (t) = 2 (t – 3) [u (t – 3) – u (t – 4)] The ramp equation is kr (t – T), where k is slope.