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Question answer of CCNA

shortest Questions and answers of CCNA

[edit] poles and zeros of transfer function

hi everyone,

      I am doing a project on classical and modern design of control systems, I have got a very basic doubt as to why we always consider the degree of denominator greater that or at-most equal to the degree of numerator(i.e why is always the number of poles should be greater than or at-most be equal to zeros for any general transfer function).Please help me out to answer this question in detail. 
 

Thanking you, yours faithfully, bhoomi