A function N (S) is said to have a pole (or zero) at infinity if the function N (1/S) has a pole (or zero) at S = ?

A function N (S) is said to have a pole (or zero) at infinity if the function N (1/S) has a pole (or zero) at S = ? Correct Answer 0

A function N (S) is said to have a pole (or zero) at infinity, if the function N (1/S) has a pole (or zero) at S = infinity. A zero or pole is said to be of multiplicity ‘r’ if (S-Z)r or (S-P)r is a factor of P(s) or Q(s).
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