수식 2: "f" left parenthesis, "x" , right parenthesis equals StartFraction, cos pi "x" Over StartAbsoluteValue, cos pi "x" , EndAbsoluteValue , EndFractionfx=cosπxcosπx
2
수식 3: "x" plus Start sum from "n" equals 0 to 10, end sum, StartFraction, "f" left parenthesis, 2 Superscript, "n" , Baseline "x" , right parenthesis Over 2 Superscript, "n" , Baseline , EndFraction left brace, 0 less than or equal to "x" less than or equal to 1 , right bracex+10∑n=0f2nx2n0≤x≤1
