The error function is defined for a) (E(s)=R(s)-Y(s)) b) (E(s)=R(s)[1-T(s)]) c) (E(s)=-R(s)left[frac{Y(s)-R(s)}{R(s)} ight]) d) All of the above

The error function is defined for

a) \(E(s)=R(s)-Y(s)\)

b) \(E(s)=R(s)[1-T(s)]\)

c) \(E(s)=-R(s)\left[\frac{Y(s)-R(s)}{R(s)}\right]\)

d) All of the above