Solution 9.10.3.2 S G a = a G @G @a = a Ka s+ a @ @a Ka s +a = s+ a K  ;aK (s+ a) 2 + K s+a  = (s+a)  s+a;a (s+a) 2  = s (s+a) S T c a = a T c @T c @a = a Ka s+(K + a) @ @a Ka s+ K +a = s+ a+K K  ;Ka Ks+K + a) 2 + K s+K + a  = (s+a)  ;a+s +K + a (s +K +a) 2  = (s+K) (s+K + a) S G K = K G @G @K = K Ka s+ a @ @K Ka s+ a = (s+a) a a s+ a = 1: S T c K = K T c @T c @a = K Ka s+ K +a @ @K Ka s+K + a = s+ K +a a  ;Ka (s+K +a) 2 + a s +K + a  =  s+ K +a a  ;K +s +K +a (s+ K +a) 2 = s+a s+ K +a