当1/2
问题描述：
当1/2
数学人气：757 ℃时间：2020-06-05 07:57:11
优质解答
当1/2
=(1-x)-(x-1/2)
=3/2-2x不明白，请写详细点根号(x^2-2x+1)-根号(1/4-x+x^2)=√(x-1)^2-√(x-1/2)^2=︱x-1︱-︱x-1/2︱=(1-x)-(x-1/2) (因为1/2
答
当1/2
=(1-x)-(x-1/2)
=3/2-2x不明白，请写详细点根号(x^2-2x+1)-根号(1/4-x+x^2)=√(x-1)^2-√(x-1/2)^2=︱x-1︱-︱x-1/2︱=(1-x)-(x-1/2) (因为1/2