Generalization of problem 13.

Put

(7.9) f(x) = -1 - -1, v=3 v(v-1) P-9 p + q = x4 h + 6 12 > where h= 1/npq. If k varies with n in such a way that k/n 0 then (7.10) ahn(kh) e-1(kh). - [When k/n2 0 this reduces to theorem 3.1; when K4/n 0 we get (7.7); when k/n 0 we get (7.7) with a fourth-degree term added in the exponent, etc.] xn