f(x)={x^2-2x,x>=0 x^2+2x,x
f(X)=f(X+2)(x
f(x)={x^2+x(x≤0),-x^2+x(x>0)
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
已知函数f(x)=2x+1,x>=0;f(x)=|x|,x
f(x)为奇函数,x>0,f(x)=sin 2x+cos x,则x
f(x)=x/(x^2+1)
函数f(x)=x-2 (x
f(x)=x^2x 求导
分段函数f(x)=x•2^x (x>=0) x^(-2) (x
已知f(x)={x/2,x>=0 -x²+3x,x=0
设f(x-1)={-sinx/x,x>0;2,x=0;x-1,x
f(x)=-x^2+2x(x>0) 0(x=0) x^2-2x(x