0171僀僫 仧/7jUdUKiSM 岰斉 | 戝朇2020/04/29(悈) 18:47:40.95ID:pHutbusZ 慜>>168捠暘丅 >>161 梌幃=儼[k=4,n] 1/(k^4-10k^2+9) =1/105+1/384+1/945+1/1920+乧乧+ 1/(n^4-10n^2+9) 戞2崁/弶崁=17/28=105/384 戞3崁/弶崁=17/39=1/9 戞4崁/戞2崁=28/410=1/5 戞5崁/戞3崁=39/511=3/11 (媥懅)