令t=10¹º
则f(t)=(t-1/t)/(t+1/t)=(t-1)/(t+1)=(t+1-2)/(t+1)=1-2/(t+1)
则f(t)=1-2/(t+1)=y
则1-2/(y+1)=t
代入t=10¹º即可
f(x)=(10x次方-10-x次方)/(10x次方+10-x次方) 的反函数
f(x)=(10x次方-10-x次方)/(10x次方+10-x次方) 的反函数
数学人气:606 ℃时间:2019-08-19 17:03:00
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