Expression 9: Start sum from "n" equals 1 to 8, end sum, StartFraction, left parenthesis, negative 1 , right parenthesis Superscript, left parenthesis, "n" minus 1 , right parenthesis , Baseline "x" Superscript, "n" , Baseline Over "n" , EndFraction8∑n=1−1n−1xnn
9
Expression 10: Start sum from "n" equals 1 to 9, end sum, StartFraction, left parenthesis, negative 1 , right parenthesis Superscript, left parenthesis, "n" minus 1 , right parenthesis , Baseline "x" Superscript, "n" , Baseline Over "n" , EndFraction9∑n=1−1n−1xnn
10
Expression 11: Start sum from "n" equals 1 to 10, end sum, StartFraction, left parenthesis, negative 1 , right parenthesis Superscript, left parenthesis, "n" minus 1 , right parenthesis , Baseline "x" Superscript, "n" , Baseline Over "n" , EndFraction10∑n=1−1n−1xnn
11
Expression 12: "x" equals 1x=1
negative 10−10
1010
12
Expression 13: "x" equals negative 1x=−1
negative 10−10
1010
13
Expression 14: Start sum from "n" equals 1 to 30, end sum, StartFraction, left parenthesis, negative 1 , right parenthesis Superscript, left parenthesis, "n" minus 1 , right parenthesis , Baseline "x" Superscript, "n" , Baseline Over "n" , EndFraction30∑n=1−1n−1xnn
14
Expression 15: Start sum from "n" equals 1 to 50, end sum, StartFraction, left parenthesis, negative 1 , right parenthesis Superscript, left parenthesis, "n" minus 1 , right parenthesis , Baseline "x" Superscript, "n" , Baseline Over "n" , EndFraction50∑n=1−1n−1xnn
15
Expression 16: Start sum from "n" equals 1 to 80, end sum, StartFraction, left parenthesis, negative 1 , right parenthesis Superscript, left parenthesis, "n" minus 1 , right parenthesis , Baseline "x" Superscript, "n" , Baseline Over "n" , EndFraction80∑n=1−1n−1xnn
