本文研究了形如∑nk=0 αkeakxDk(ak≤0)及∑nk=0(-1)kα2kDkea2kxDk+i-2∑nk=0α2k+1(Dkea2k+1xDk+1+Dk+1ea2k+1xDk)(ak≤0)的算......