수식 1: "f" left parenthesis, "x" , right parenthesis equals left brace, 0 less than "x" less than 1 : StartFraction, 1 Over StartRoot, "x" , EndRoot , EndFraction , "x" greater than or equal to 1 : StartFraction, 1 Over "x" squared , EndFraction , right brace 그래프가 존재합니다. 오디오 추적을 활성화하려면 Alt+T 를 누르세요.fx=0<x<1:1x,x≥1:1x2
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수식 2: Start integral from 0 to infinity , end integral, "f" left parenthesis, "x" , right parenthesis "d" "x" equals 2.9 9 9 9 9 9 9 9 4 9 1∫∞0fxdx