Question

Block diagram for the feedback control system is drawn below: R(s) E(s) G,(s) 10.2s 20s Figure 1: Block diagram for the feedback control systemm

please show the processes of how to getting the transfer function G(s)=Y(s)/E(s)=([KGp(s)]/20s)/1+KtGp(s)

(Auctullay I just don't know why Y(s)=[KGp(s)] and E(s)=1+KtGp(s) .)

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