请问下 若f(x+2)=x^2+5x+7,则f(x)= 我想(x+2)^2+5(x+1)+7 答案=x^2+x+1 怎么
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
f(x)=x/(x^2+1)
x-2 ,X>=0 f(x)=f[f(x+5)],x分段函数f(x)= x-2 ,X>=0 f[f(x+5)],x
f(X)=f(X+2)(x
若f(x)=2f(1/x)=2x+1/x,求f(x)
大一下高数题,偏导数与全微分:若f(x,-x)=x^2+2x,fx(x,-x)=5x+1,则fy(x,-x)=?
f(x)=ln(1+x)-[2x/(x+2)] 请问f(x)的导数f ’(x)是多少
F(X)满足F(x)+2f(x分之1)=3X,求f(x)
已知f(x)满足2f(x)+f(1/x)=3x,求f(x)
已知f(x)满足2f(x)+f(1/x)=3x,求f(x)?
设函数f(x)满足f(x)+2f(1/x)=x,求f(x)
已知f(x)满足2f(x)+f(-x)=-3x+1,求f(x)