> 数学 >
已知f(x+1/x)=x平方+1/x平方+1/x,求fx
人气:345 ℃ 时间:2020-10-01 23:30:36
解答
令x+1/x=t,则X=1/(t-1),带入原式可得,f(t)=(t-1)^2+1/(t-1)^2+1/(t-1),令t=x,则f(x)=(x-1)^2+1/(x-1)^2+1/(x-1).
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版