English Senior High almost 10 yearsago

It is true that we can communicate in many nonverbal ways, but our ability to communicate would be very limited without language.この訳がわかりません

Mathematics Junior High over 10 yearsago

この問題 解き方教えてください！！ 答えは 28になります！！

Mathematics Senior High over 10 yearsago

関数の極限がわかりません！ どんな考え方で解けばいいか教えてください。