A group of independent sources may be made active and inactive collectively, if we wish. For example, suppose there are three independent sources. The theorem above staes that we may find a given response by considering each of the three sources acting alone and adding the three results. Altenatively, we may find the response due to the first and second sources operating with the third inactive, and then add to this the response caused by the third source acting aloneA group of independent sources may be made active and inactive collectively, if we wish. For example, suppose there are three independent sources. Altenatively, we may find the response due to the first and second sources operating with the third inactive, and then add to this the response caused by the third source acting alone. The theorem above staes that we may find a given response by considering each of the three sources acting alone and adding the three results