Final answer:
The unit impulse function is obtained by using the limiting process on the rectangular function.
Step-by-step explanation:
The unit impulse function is obtained by using the limiting process on the rectangular function.
When we take the limiting process of a rectangular function, where the width of the rectangle approaches zero and the height approaches infinity, we obtain the unit impulse function.
This can be represented mathematically as:
δ(t) = lima→0 rect(t/a)