【那个】@stanchcorder6你既然力挺991ES PLUS C,那么拿出实物吧

和Wu站在一起

这个比789升级后能强多少

fx-991ES PLUS C/fx-115ES PLUS具有,789没有的功能
repeating decimal (repetend)
preANS (pre answer) in addition to the usual ANS (last answer)
PI(f(x),a,b) (product of a series)
Int (integer function)
Intg (greatest integer function)
Q1 - Median - Q3 (1-variable statistics)
vertex of parabola (quadratic) in addition to the quadratic formula
radical form of quadratics and cubics
g(x) (second TABLE function added to f(x))
INEQ (inequality solutions for quadratics and cubics)
VERIF (verify statements) checks answers to problems
DIST (normal & binomial & poisson distributions)
No-Solution, Infinite Solution (2X2 3X3 Simultaneous Equations)

fx-991ES PLUS C/fx-115ES PLUS具有,789没有的功能
(加粗并说明用途)
repeating decimal (repetend)[不用转换分数]
preANS (pre answer) in addition to the usual ANS (last answer)[代替字母变量,很方便]
PI(f(x),a,b) (product of a series)[求积]
Int (integer function)[取整]
Intg (greatest integer function)[不大于x的最大整数]
Q1 - Median - Q3 (1-variable statistics)
vertex of parabola (quadratic) in addition to the quadratic formula
[抛物线的最值点]
radical form of quadratics and cubics
g(x) (second TABLE function added to f(x))
[同时table两个函数]
INEQ (inequality solutions for quadratics and cubics)
VERIF (verify statements) checks answers to problems
[验证表达式是否成立]
DIST (normal & binomial & poisson distributions)
[概率分布]
No-Solution, Infinite Solution (2X2 3X3 Simultaneous Equations)
[无解无穷解显示,不会出现error]

似乎789矩阵功能更丰富，除了求行列式的值和转置外面，还能求共轭矩阵和逆矩阵，这两个功能觉得还是挺有用