MathematicsEasy175×since 2002Q2675If the functions f(x)=x33+2bx+ax22f(x)=\frac{x^3}{3}+2 b x+\frac{a x^2}{2}f(x)=3x3+2bx+2ax2 and g(x)=x33+ax+bx2,a≠2bg(x)=\frac{x^3}{3}+a x+b x^2, a \neq 2 bg(x)=3x3+ax+bx2,a=2b have a common extreme point, then a+2b+7a+2 b+7a+2b+7 is equal to :A6B32\frac{3}{2}23C3D4Check answerSkip