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x2-2xy+y2/x2-y2其中x=√3+1,y=√3-1
人气:415 ℃ 时间:2020-04-13 20:08:37
解答
x²-2xy+y²/x²-y²
=(x-y)²/(x+y)(x-y)
=(x-y)/(x+y)
=2/2√3
=(√3)/3
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