3f(x 1)-2(x-1)=2x 17a3 2a2b ab2-2a2b-ab2 b3
问题描述：
3f(x 1)-2(x-1)=2x 17a3 2a2b ab2-2a2b-ab2 b3
limx*sin(1/x) (60*140 50*140)*2 60*50x2^2-ax2)/(x1^2-ax1)>0
答
f(x)=ax^2 bx c比如AD=AB BD=AB BC/2比如mx2-(1-m)x 1>0比如AD BE CF=(AB BC CA) (BC/2 CA/2 AB/2)