Question: Use arguments based on the phase angle in frequency response to determine if the following combinations of G = G v G p G m

Use arguments based on the phase angle in frequency response to determine if the following combinations of G = GvGpGmand Gcbecome unstable for some value of Kc.

a.

|G = G. = K. (4s + 1)(2s + 1)

b.

G. = K. (1+ G = (4s + 1)(2s + 1) 5s

c.

|G = G. = K. (4s + 1)(2s + 1) G. =

d.

K. (1+ G = (4s + 1)(2s + 1) 5s

e.

|G = G. = K. (4s + 1)(2s + 1) G. = K. (1+ G = (4s + 1)(2s + 1) 5s

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