已知实数X,Y满足Y=根号下(X-0.5) +2011根号下(0.5-X) +0.5 求X+2y-1的绝对值-根号下y²-2y+1
问题描述:
已知实数X,Y满足Y=根号下(X-0.5) +2011根号下(0.5-X) +0.5 求X+2y-1的绝对值-根号下y²-2y+1
答
x-0.5=0,x=0.5,y=0.5
|x+2y-1|-|y-1|=0.5-0.5=0