Which of the following are IIR filters? a. C N = 0.1R N + 0.4R N-1 +

Question:

Which of the following are IIR filters?

a. CN = 0.1RN + 0.4RN-1 + 0.1 RN-2

b. CN = CN-1 + 0.1 RN + 0.4RN-1 + 0.1 RN2

c. CN = - 0.2CN-1 + 0.2CN-2 + RN.

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