设f(x)={3x+2,x^2+1,2/x 联立 条件有x≤0,0≤x≤1,x＞1,求limx→0f(x)及limx→1f(x)

设f(x)={3x-1,x=0,求f(-x),f(x-2). 高数题：设f(x)=x.(x+1).(x+2).(x+n),则f 3Q 设函数f(x)={(1/2)^x(x≥4),f(x+3)(x 设f(x)=x/2+1/x(x 设函数f(x)满足f(x)+2f(1/x)=x,求f(x) 设f(x)+2f(1/x)=3x,这 f(x)的表达式是? 设函数f(x)=(1/2）^x(x≥4), f(x)=f(x+3)(x 设2f(x)+xf(1/x)=(x+2x)/(x+1),求f(x). 设函数f(x)=(x-1)(x-2)...(x-100)(x>100),求F'(X) 设f(x)=x^2-3x+2求f(a),f(1/x),f(x)+1 设f(x)满足3f(x)+2f(1/x)=4x,则f(x)=＿＿. 设f(x)满足f(x)+2f(1/x)=3x,则f(x)的表达式是? 设f(x)满足关系式f(x)+2f(1/x)=3x,求f(x) 设 f（x）满足关系式 f(x)+2f(1/x)=3x,求f（x）. 设f(x)满足关系式f(x)+2f(1/x)=3x,求f(x) 设f(x)+f(x-1／x)=2x,求f(x)=? 设函数f(x)=x^2-1 / x^2+3x,则f ' (1)= 设f(x)=(2x+5)^2*(3x-1)^4,求f'(x)