(2014³-2*2014³-2012)/(2014³+2014²-2015)
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/30 22:40:26
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(2014³-2*2014³-2012)/(2014³+2014²-2015)
(2014³-2*2014³-2012)/(2014³+2014²-2015)
(2014³-2*2014³-2012)/(2014³+2014²-2015)
(2014³-2*2014²-2012)/(2014³+2014²-2015) 第二项改成了平方
=[2014²(2014-2)-2012]/[2014²(2014+1)-2015]
=2012×(2014²-1)/2015×(2014²-1)
=2012/2015