In this video I will explain the mathematical definition of e=2.7182818284590... The definition is e=lim(x approaches infinity)[1+(1/x)] raised to the power of x. When x=1 e~2, x=2 e~2.25, x=3 e~2.370, x=4 e~2.441, x=5 e`2.488, and x=50 e=2.692. We can notice how as x approaches infinity e=2.7182818284590...