Choose the right combination of words to complete the blanks in the following sentence, which explains vibration. When vibration is expressed by x(t) = Aeatcos(wt-q), if a is positive, the value becomes the ( (1) ), and if a is negative, the value becomes the ((2)). (1) (2) irregular vibration 1. regular vibration 2. damped vibration divergent vibration 3. irregular vibration regular vibration damped vibration 4. divergent vibration 5. divergent vibration periodic vibration

Choose the right combination of words to complete the blanks in the following sentence, which explains vibration. When vibration is expressed by x(t) = Aeatcos(wt-q), if a is positive, the value becomes the ( (1) ), and if a is negative, the value becomes the ((2)). (1) (2) irregular vibration 1. regular vibration 2. damped vibration divergent vibration 3. irregular vibration regular vibration damped vibration 4. divergent vibration 5. divergent vibration periodic vibration