偶函数
Even function A function $f(x)$ is even if $f(-x) = f(x)$ for all $x$ in its domain. Its graph is symmetric about the $y$-axis.
CSCA 数学 考试术语
Even function A function $f(x)$ is even if $f(-x) = f(x)$ for all $x$ in its domain. Its graph is symmetric about the $y$-axis.
CSCA 数学 考试术语