计算:(2011³-2×2011²-2009)/(2011³+2011²-2012)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 07:31:21
![计算:(2011³-2×2011²-2009)/(2011³+2011²-2012)](/uploads/image/z/935194-58-4.jpg?t=%E8%AE%A1%E7%AE%97%3A%282011%26%23179%3B-2%C3%972011%26%23178%3B-2009%29%2F%282011%26%23179%3B%2B2011%26%23178%3B-2012%29)
计算:(2011³-2×2011²-2009)/(2011³+2011²-2012)
计算:(2011³-2×2011²-2009)/(2011³+2011²-2012)
计算:(2011³-2×2011²-2009)/(2011³+2011²-2012)
设2011=a,则原式:(a³-2a²-a+2)/(a³+a²-a-1)=(a²-1)*(a-2)/(a²-1)*(a+1)=a-2/a+1=2009/2012.不懂再问我我会说的详细点,
计算啊