f(x)=4x+x^2-2/3x^3如何求导?

f(x)=4x+x^2-2/3x^3如何求导? f(x+1)+f(x-1)=4x^3-2x求f(x) 判断函数f(x)=3x^2+4x[x>=0],-x^2[x 函数f(x)=x^3+2x^2-3x-6如何变形为f(x)=(x-3^1/2)(x+3^1/2)(x+2)? 函数f(x)={(1/2)^x,(x>4),f(x+3),(x 函数f(x)={(1/2)^x,(x>4),f(x+3),(x 设函数f(x)={(1/2)^x(x≥4),f(x+3)(x 数学f(x)=x(x+1)(x+2)(x+3)(x+4)(x+5),求f'(0)=? f(x)=x(x-1)(x+2)(x-3)(x+4)……(x+100),求f'(1) 已知f(x)=x(x-1)(x-2)(x-3)(x-4)(x-5),则f‘(0)为 f(x+2)>=f(x)+2,f(x+3) 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) , 如何证明方程f(x)=x^4+2x^3-12x^2-8x+17有4个解为什么f（x）/x-1=x^3+4x^2-10x-17 我又来了.1.f(x)=2x/x^2+4 f(x)=x^2/x^2+1 f(x)=3x+1/x-2 此类求值域问题如何解?