x+1/x=2 求(x^2008+x^-2008-2)/(x^2009+x^-2009)的值
x+1/x=2 求(x^2008+x^-2008-2)/(x^2009+x^-2009)的值
数学人气:761 ℃时间:2019-10-19 17:26:14
优质解答
x+1/x=2,所以x=1;带入得到(x^2008+x^-2008-2)/(x^2009+x^-2009)=1
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