计算:2000³+2000²-2001分之2000³-2*2000-1998
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/28 04:13:20
![计算:2000³+2000²-2001分之2000³-2*2000-1998](/uploads/image/z/11587896-0-6.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A2000%26%23179%3B%2B2000%26%23178%3B-2001%E5%88%86%E4%B9%8B2000%26%23179%3B-2%2A2000-1998)
x){nued``lhni
cZXO;ڞFi86IE_`gC<ٽ$$=o=щ0
F0!Dچ`P`:@@(
4`jGeD%! 냼ᚙ雙$Ay6w=HJ Պh
计算:2000³+2000²-2001分之2000³-2*2000-1998
计算:2000³+2000²-2001分之2000³-2*2000-1998
计算:2000³+2000²-2001分之2000³-2*2000-1998
令a=2000
则原式=[a³-2a-(a-2)]/[a³+a²-(a+1)]
=[a²(a-2)-(a-2)]/[a²(a+1)-(a+1)]
=(a-2)(a²-1)/[(a+1)(a²-1)]
=(a-2)/(a+1)
=1998/2001
=666/667
来张图片吧