収しゅう束そく級きゅう数すうしゅうそくきゅうすうじ字FuriganaMeanings1nounconvergent seriesmathematics›Mathematical term for an infinite series whose partial sums approach a finite limit.この収しゅう束そく級きゅう数すうの和わを求もとめるのは難むずか