设f(x)=x^3+4x^2+11x+7,则f(-x)等於多少?a.-x^3+4x^2-11x+7b.-x^3-4x^2-11x+7c.-x^3+4x^2+11x+7d.-x^3-4x^2+11x+7为什麽会是选a呢?不是应该是b吗?

设f(x)=x^3+4x^2+11x+7 则f(x+1)等于 设函数f(x)={(1/2)^x(x≥4),f(x+3)(x 设函数f(x)=(1/2）^x(x≥4), f(x)=f(x+3)(x 设f(x)满足3f(x)+2f(1/x)=4x,则f(x)=＿＿. 设f(x)={3x-1,x=0,求f(-x),f(x-2). 设f(x)=x^2+11x+7,则f(x+1)= 设f(x)=x^3+4x^2+11x+7,则f(-x)等於多少?a.-x^3+4x^2-11x+7b.-x^3-4x^2-11x+7c.-x^3+4x^2+11x+7d.-x^3-4x^2+11x+7为什麽会是选a呢?不是应该是b吗? 设F（X）=2X^2-3X+7,求F（X+1）. 设f(x)=(2x+5)^3(3x-10)^4,求f'(x) 设f(x+2)=4x²-3x,则f(x)= 设 f（x+2）=4x ² - 3x ,则f（x）= 设f(x)=(2x+5)^2*(3x-1)^4,求f'(x) 设函数f(x)=lg(3/4-x-x^2),判断f(x)的奇偶性 设f(x)=log2(x^2-3x+4),则f(x)的定义域 设f(x)=x^3+4x^2+11x+7,则f(x+1)等於多少?a.x^3+7x^2+22x+23b.x^3-7x^2+22x+23c.x^3+7x^2-22x+23d.x^3-7x^2-22x+23 设f(x)=x(2x-1)(x+3)(x-7),则f'(x)=0有几个正根 设f(x)=x(x-1)(x-2)(x-3)(x-4),则f‘（0）=? 设f(x)=(x-1)(x-2)(x-3)(x-4),证明f`(x)=0有三个实根.