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数学
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39/X+6/(X-2)=8
人气:441 ℃ 时间:2020-05-23 02:00:50
解答
左右乘x(x-2) 39(x-2)+6x=8x(x-2)
39x-78+6x=8x^2-16x
8x^2-61x+78=0
利用求根公式x1=6,x2=1.625都不是增根,所以符合
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