StartFraction, left parenthesis, negative 1 , right parenthesis Superscript, left parenthesis, "n" plus 1 , right parenthesis , Baseline Over "n" , EndFraction Has graph. To audio trace, press ALT+T.−1n+1n
Start sum from "i" equals 1 to "n" , end sum, StartFraction, left parenthesis, negative 1 , right parenthesis Superscript, left parenthesis, "i" plus 1 , right parenthesis , Baseline Over "i" , EndFraction Has graph. To audio trace, press ALT+T.n∑i=1−1i+1i