表达式3: "I" Subscript, "n" "i" "t" , Baseline equals "L" to left bracket, , right bracket , "v" to left bracket, .5 for "i" equals left bracket, 1... "N" , right bracket , right bracketInit=L→,v→.5fori=1...N
3
表达式4: "N" equals 50N=50
negative 10−10
5050
4
variables
对学生隐藏该文件夹。
5
表达式9: length left parenthesis, "L" , right parenthesislengthL
