f(x-1/x)=√[(x-1/x)^2+4]
f(3)=√(3^2+4))=√13
已知f (x—1/x)=x+1/x,则函数f(3)等于?
已知f (x—1/x)=x+1/x,则函数f(3)等于?
数学人气:663 ℃时间:2019-12-25 02:14:13
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