设函数f(x)=(1+x²)/(1-x²)则有A是偶函数,f(1/x)=-f(x) B偶函数,f(1/x)=f(x)选哪个啊
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![设函数f(x)=(1+x²)/(1-x²)则有A是偶函数,f(1/x)=-f(x) B偶函数,f(1/x)=f(x)选哪个啊](/uploads/image/z/8611366-22-6.jpg?t=%E8%AE%BE%E5%87%BD%E6%95%B0f%28x%EF%BC%89%3D%281%2Bx%26%23178%3B%29%2F%281-x%26%23178%3B%29%E5%88%99%E6%9C%89A%E6%98%AF%E5%81%B6%E5%87%BD%E6%95%B0%2Cf%281%2Fx%29%3D-f%28x%29+B%E5%81%B6%E5%87%BD%E6%95%B0%2Cf%EF%BC%881%2Fx%EF%BC%89%3Df%28x%29%E9%80%89%E5%93%AA%E4%B8%AA%E5%95%8A)
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设函数f(x)=(1+x²)/(1-x²)则有A是偶函数,f(1/x)=-f(x) B偶函数,f(1/x)=f(x)选哪个啊
设函数f(x)=(1+x²)/(1-x²)则有A是偶函数,f(1/x)=-f(x) B偶函数,f(1/x)=f(x)选哪个啊
设函数f(x)=(1+x²)/(1-x²)则有A是偶函数,f(1/x)=-f(x) B偶函数,f(1/x)=f(x)选哪个啊
f(1/x)=(1+x^2)/[-(1-x^2)]=-f(x),所以选A