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Difference equation technique for higher order systems is used in:

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Difference equation technique for higher order systems is used in:

(a) Laplace transform

(b) Fourier transform

(c) Z-transform

(d) None of the mentioned

This question was posed to me during an online interview.

My doubt stems from Difference Equations in section Digital Control Systems of Control Systems

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The correct option is (c) Z-transform

The best I can explain: For higher order systems Z- transform which is transforming discrete time domain into z domain and is technique is convenient for analysis and design of linear sampled data systems.

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