Let the distribution of X be N(, 2). Show that the points of inflection of the graph

Question:

Let the of X be N(μ, σ2). Show that the points of inflection of the graph of the pdf of X occur at x = μ ± σ.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...