12. Figure P6.25 shows root-loci of the open-loop transfer function G(s)H(s) of a system. Consider the following inferences drawn from the figure: 1. It has no zero. 2. It is a stable system. 3. It is a second order system. Which of these inferences are correct? (a) 1, 2 and 3 (b) 1 and 2 (c) 2 and 3 (d) 1 and 3
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