已知f(x)=a½+a﹣½=3,求a+a﹣¹,a²+a﹣²的值.
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已知f(x)=a½+a﹣½=3,求a+a﹣¹,a²+a﹣²的值.
已知f(x)=a½+a﹣½=3,求a+a﹣¹,a²+a﹣²的值.
已知f(x)=a½+a﹣½=3,求a+a﹣¹,a²+a﹣²的值.
可配方啊: