Impulse response of a causal system

For the causal system, y(n)=0.2x(n)+0.8y(n-1) How would I go about calculating the the impulse response? I'm not entirely sure how to convert the system into a state space equation or proper syntax notation that can then be used in the impulse() function? Any help is greatly appreciated!

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Asked:

on 6 Dec 2016

Edited:

on 6 Dec 2016

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