Question

求y=|x-1|-|x+5|的最小值和最大值

Answer 1

当x>1时,y = x-1-(x+5) = -6
当-5<x<1时,y -(x-1)-(x+5)="-2x-4
" ==""> 当x<-5时,y = -(x-1)+(x+5) = 6
可作图,最大值为6,最小值为-6
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