Show that Eq. (43.17) may be written as N (t) = N0 () n, where n = t/T p is the number of half-lives that

Show that Eq. (43.17) may be written as N (t) = N0 (½) n, where n = t/T½ p is the number of half-lives that have elapsed since t = o. (This expression is valid even if n is not a whole number.)