f(x)= (x−2)/(x^2-9)
f(x)= (x−2)/(x^2-9)
f(X)=f(X+2)(x
f(2-x)=f(x)
f(x)=x²+3x|x-2|
为什么f(x)满足f(x+1)=1/f(x)可以得出f(x+2)=f(x)
1.若f(x+1/x)=x^2+1/x^2,求f(x)
已知f(x+1/x)=(x-1/x)^2,求f(x),用换元法解.
f(x+1/x)=(x+1/x)²-2,用配凑法求f(x)
求f(x)=(x-2)^2/(x+1),f(x)=(x^2+9)(x-3/x)的导数.
已知函数f(x)=log3^x,(x>0),f(x)=2^x(x≤0)则f[f(1/9)]=
f(x)=x/(x^2+1)
函数f(x)=x-2 (x