The largest time constant of the characteristic equation (s^2 + 2s + 2)(s + 3) = 0 is
- A. 1
- B. 1.5
- C. 2
- D. 3
Answer: A. 1
Explanation: Poles of (s² + 2s + 2)(s + 3) are s = -1 ± j and s = -3. Dominant pole has real part -1, giving largest time constant τ = 1/|Re| = 1 s.