x-1/x=3,求xx+1/xx的值因为平方打不来,XX代表X的平方,哪位仁兄帮个忙算下吧...步骤写清楚些,理由要充分...
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![x-1/x=3,求xx+1/xx的值因为平方打不来,XX代表X的平方,哪位仁兄帮个忙算下吧...步骤写清楚些,理由要充分...](/uploads/image/z/999764-44-4.jpg?t=x-1%2Fx%3D3%2C%E6%B1%82xx%2B1%2Fxx%E7%9A%84%E5%80%BC%E5%9B%A0%E4%B8%BA%E5%B9%B3%E6%96%B9%E6%89%93%E4%B8%8D%E6%9D%A5%2CXX%E4%BB%A3%E8%A1%A8X%E7%9A%84%E5%B9%B3%E6%96%B9%2C%E5%93%AA%E4%BD%8D%E4%BB%81%E5%85%84%E5%B8%AE%E4%B8%AA%E5%BF%99%E7%AE%97%E4%B8%8B%E5%90%A7...%E6%AD%A5%E9%AA%A4%E5%86%99%E6%B8%85%E6%A5%9A%E4%BA%9B%2C%E7%90%86%E7%94%B1%E8%A6%81%E5%85%85%E5%88%86...)
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x-1/x=3,求xx+1/xx的值因为平方打不来,XX代表X的平方,哪位仁兄帮个忙算下吧...步骤写清楚些,理由要充分...
x-1/x=3,求xx+1/xx的值
因为平方打不来,XX代表X的平方,哪位仁兄帮个忙算下吧...步骤写清楚些,理由要充分...
x-1/x=3,求xx+1/xx的值因为平方打不来,XX代表X的平方,哪位仁兄帮个忙算下吧...步骤写清楚些,理由要充分...
x-1/x=3
两边平方
(x-1/x)^2=9
x^2+(1/x)^2-2=9
x^2+(1/x^2)=11
x-1/x=3
两边平方
x^2-2*x*1/x+1/x^2=3^2
x^2-2+1/x^2=9
x^2+1/x^2=11
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x-1/x=3,求xx+1/xx的值因为平方打不来,XX代表X的平方,哪位仁兄帮个忙算下吧...步骤写清楚些,理由要充分...
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