Let $f(x)=e^{\frac{-x^{2}}{b}}$ , Where B Is a Positive Constant $-b$ C) $\sqrt{\frac{b}{2}}$ D) $-\sqrt{\frac{b}{2}}$

Multiple Choice

Let $f(x) =e^{\frac{-x^{2}}{b}}$ , where b is a positive constant.Which of the following are inflection points of f?

A) b
B) $-b$
C) $\sqrt{\frac{b}{2}}$
D) $-\sqrt{\frac{b}{2}}$
E) 0