수식 2: "g" left parenthesis, "x" , "n" , right parenthesis equals Start sum from "k" equals 0 to "n" , end sum, left parenthesis, negative "x" squared , right parenthesis Superscript, "k" , Baselinegx,n=n∑k=0−x2k
2
수식 3: "g" left parenthesis, "x" , "n" , right parenthesisgx,n