35kv悬挂式避雷器:不等号4!!!!1
来源:百度文库 编辑:神马品牌网 时间:2024/05/18 21:20:22
x>1
求y=(2x^2-2x+1)/(1-x)最大值
答案:-2根号2-2
求y=(2x^2-2x+1)/(1-x)最大值
答案:-2根号2-2
y=-(2x^2-2x+1)/(x-1)
=-[2(x-1)^2+2(x-1)+1]/(x-1)
=-[2(x-1)+1/(x-1)+2]≤-[2√2+2]=-2根号2-2