How many roots with positive real parts do the equation s3+s2-s+1=0 have?

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Control Systems Practice Test: State Variable Analysis and Design — practice the complete quiz, review flashcards, or try a random question.

State Variable Analysis and Design topics include: Concepts of state, state variables and state model, solutions of state equations, controllability and observability, pole placement by state feedback, observer systems and state models for linear continuous-time systems. State-variable analysis, also known as state-space analysis, is a procedure that can be used to analyze and design systems. It can be applied to linear and nonlinear circuits, as well as circuits with time-varying parameters.  A state variable is a characteristic of a system that can be described by a set of first-order... Show more

How many roots with positive real parts do the equation s<sup>3</sup>+s<sup>2</sup>-s+1=0 have?