怎么写
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/15 07:13:42
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怎么写
怎么写
怎么写
原式=[2001²(2001-2)-1999]/[2001²(2001+1)-2002]
=[1999*(2001²-1)]/[2002*(2001²-1)]
=1999/2002
很简单,1999÷2002
=(2001³-2*2001²-2001+2)/(2001³+2001²-2001-1)
=[(2001²-1)(2001-2)]/[(2001²-1)(2001+1)]
=1999/2002
分子 :2001^2*(2001-2)-1999=( 2001^2-1)*1999 = 2000*2002*1999
分母 :2001^2*(2001+1)-2002 =(2001^2-1)*2002 = 2000*2002*2002
所以结果为 1999/2002
(2001³-2×2001²-1999)/(2001³+2001²-2002)
=(2001³-2×2001²+2001-2001-1999)/(2001³-1+2001²-2001)
=[2001×(2001-1)²-4000]/[(2001-1)(2001²...
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(2001³-2×2001²-1999)/(2001³+2001²-2002)
=(2001³-2×2001²+2001-2001-1999)/(2001³-1+2001²-2001)
=[2001×(2001-1)²-4000]/[(2001-1)(2001²+2001+1)+2001(2001-1)]
=(2001×2000²-4000)/[2000×(2001²+2002)+2001×2000]
=[2000×(2001×2000-2)]/[2000×(2001²+2002+2001)]
=(2001×2000-2)/(2001²+2×2001+1+2001-2001)
=(2001×2000-2)/(2001+1)²
=4001998/4008004
=2000999/2004002
=1999/2002
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