Forwhich of the following functions f is ~$f\left ( x \right )=f\left ( 1-x \right )$~ for all x ?
~$f\left ( x \right )=1-x$~
~$f\left ( x \right )=1-x^{2}$~
~$f\left ( x \right )=x^{2}-\left ( 1-x \right )^{2}$~
~$f\left ( x \right )=x^{2}\left ( 1-x \right )^{2}$~
~$f\left ( x \right )=\frac{x}{1-x}$~
most simpe method is if f(x)=x2(1-x)2, so F(1-x)=(1-x)2*(1-(1-x))2=(1-x)2*x2. 我绕了一大圈的抛物线,发现最简单的方法在这里。
登录 或 注册 后可以参加讨论