Respuesta :
The most important factor in determining the amplitude of the resulting pulse is the difference in the sign of the waveforms. If the waveforms have the same sign, then they will reinforce each other and the result will be a pulse with a larger amplitude. If the waveforms have opposite signs, then they will cancel each other out and the result will be a pulse with a smaller amplitude.
In the first case, the two waveforms have the same sign, so they reinforce each other. The result is a pulse with the largest amplitude.
In the second case, the waveforms have opposite signs, so they cancel each other out. The result is a pulse with the smallest amplitude.
In the third case, the waveforms have the same sign, so they reinforce each other. The result is a pulse with a larger amplitude than in the second case, but smaller than in the first case.
In the fourth case, the waveforms have opposite signs, so they cancel each other out. The result is a pulse with an amplitude that is smaller than in the third case.
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