Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
수학에서 함수는 입력과 출력을 연결하는 규칙입니다.suhakeseo hamsuneun ibryeokgwa chulryeogeul yeon-gyeolhaneun gyuchigimnida.In mathematics, a function is a rule that connects inputs and outputs.