Correction to my answer to exercise 13 Jan 3, 2018 9:43:59 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Admin on Jan 3, 2018 9:43:59 GMT In my answer to exercise 13 I have changed all references to $\ln$ to $\log$ as a result of my post about consistent notation for logarithms, and republished my answer.Vasco