f{X}=3+5X-2X^2

f(x)=5x+3 f(x)=5x f(x)=x+2x+1 f(x)=5x+3 f(x)=5x f(x)=x+2x+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+2)>=f(x)+2,f(x+3) 数学f(x)=x(x+1)(x+2)(x+3)(x+4)(x+5),求f'(0)=? 已知f(x)=x(x-1)(x-2)(x-3)(x-4)(x-5),则f‘(0)为 3f(x)+xf'(x)=5x平方+2x-3,f(x)为多项式函数, 求f(x) 已知f(x)满足2f(x)+f(1/x)=3x,求f(x) 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(-x)=-3x+1,求f(x) 已知f(x)满足f(x)+2f(1/x)=3x,求f(x) , 已知函数f(x)=3x²-5x+2,求f(f(x))= 3f(x)+5f(1/x)=2x+1,则f(x)=? 3f(x)+5f(1/x)=2/x+1,求f(x) 已知3f（x)+5f(1/x)=2x+1求f（x） f(x)=x^2+x (x f(X)=f(X+2)(x ① f(x)为一次函数,且f[f(x)]=1+4x,求f(x)② f(x)+2f（-x）=3x+x平方 ,求f(x)③ f(x)为一次函数,且f(x+1)+f(x-1)=2x平方-4x+4,求f(x)④ f(2x-1)定义域（-1,5],求f(2-5x)定义域,求f(x)定义域⑤ f(x)定义域[0,2] ,求f(x平方)