f(x)=2-(x分之3)∠DAB=60°,AD=AA1

问题描述:

f(x)=2-(x分之3)∠DAB=60°,AD=AA1
f(X)满足f(0)=f(4)y(5)=52-4*5 5=10

limx*sin(1/x) 所以f(-x 5)=—f(x 5)还是—f(x-5)所以M=N=AD=AB BD=AB BC/2