定义符号函数sgnx={1x>0,0x=0,-1x
问题描述:
定义符号函数sgnx={1x>0,0x=0,-1x
答
若x满足(x-3)/(x-2)≤0时
0sgnx=1
定义符号函数sgnx={1x>0,0x=0,-1x
若x满足(x-3)/(x-2)≤0时
0sgnx=1