设f(x)=ax^3 +3x^2 +2,若f'(-1)=6,则实数a的值为

急设函数f(x)=2{x}^{3}+ax-2,已知f(x) 设函数f(x)=ax+2,不等式｜f(x)｜ 设f(x)=-1/3x^3+1/2x^2+2ax 当0 设f(x)=-1/3x^3+1/2x^2+2ax 当0 设函数f(x)=x^3+ax^2-9x-1(a 设函数f(x)=x^3+ax^2-9x-1(a 设函数f(x)=x^3+ax^2-9x-1(a 设函数f(x)=x^3+ax^2-9x-1(a 设f(x)=x^5+ax^3+bx-8,且f(-2)=10,则f(x)= 设函数f(x)=-1/3x^3+2ax^2+1/3a(0 设函数f(x)=ax^2-2x+3,对于满足1 设函数f(x)=-x^2+4ax-3a^2,若0 设函数f(x)=-x^2+4ax-3a^2,若0 设函数f(x)=-x^2+4ax-3a^2.若0 设曲线f(x)=ax+ln(2-x)求导 设f(x)=x^2+ax+b,且0 设f(x)=x2+2ax-3,1≤x≤2,求f(x)的最小值g(a) （x-3)(2x-1)设函数f(x)=ax^³+b,已知f(1)=0,则