ie-toN:】 (2)求B =k(lnN!+公ng,-lnni) =k(NInN-N+>niIng-n ln ni+n =k(NnN+in是)，（将=e+B,代入） =k[NInN->ni(&+Be)] =k(NInN-&N-BU) =k(NInN-N In N 多g,eBe,-BU) =k[NIn(>g,eBe)-BU] 》2