隐藏 标签 left parenthesis, StartFraction, 4 left parenthesis, "n" minus 1 , right parenthesis Over 2 , EndFraction , 0 , right parenthesis4n−12,0
标签
equals=
left parenthesis, 20 , 0 , right parenthesis20,0
8
表达式9: "y" equals negative 2 "x" plus "k" minus "a" left brace, 0 less than or equal to "y" less than or equal to StartFraction, "k" Over 2 , EndFraction minus "b" , right bracey=−2x+k−a0≤y≤k2−b
9
表达式10: "y" equals 2 "x" minus "a" left brace, 0 less than or equal to "y" less than or equal to StartFraction, "k" Over 2 , EndFraction minus "b" , right bracey=2x−a0≤y≤k2−b
10
表达式11: "y" equals 0 left brace, 0 less than or equal to "x" less than or equal to StartFraction, "k" Over 2 , EndFraction , right bracey=00≤x≤k2
11
隐藏 标签 left parenthesis, 0 , 0 , right parenthesis , left parenthesis, StartFraction, "k" Over 4 , EndFraction , StartFraction, "k" Over 2 , EndFraction , right parenthesis0,0,k4,k2
标签
equals=
left parenthesis, 0 , 0 , right parenthesis0,0
left parenthesis, 10 , 20 , right parenthesis10,20
12
n = ${n} ⇔ ¹⁄₂ n ( n + 1 ) = ${T_n} left parenthesis, StartFraction, "k" Over 2 , EndFraction , 0 , right parenthesisk2,0
