Question: A unity feedback system with the following loop transfer function, is marginally stable for G ( s ) = 8 K ( s + 2

A unity feedback system with the following loop transfer function, is marginally stable for
G(s)=8K(s+2)(s2+2s+4)
a.,K=10
b.,K=3
c.,K=1
A unity feedback system with the following loop

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