Today I continued the section in my maths book on 'The exponential function' with the expression e^x. It says:

The most common exponential expression is e^x where e is the exponential constant, 2.71828 . . . .

Wikipedia says this:

The number e, known as Euler's number, is a mathematical constant approximately equal to 2.71828
which can be characterized in many ways. It is the base of the natural logarithm.

Euler is an interesting chap; he also has an asteroid named after him.

Anyway, here is that function on my calculator:

For e² I do 2 [SHIFT] e² = 7.389...

I then worked through some examples in my maths book. I got somewhat stumped at trying to simplify these:

e^3y(1+e^y) - e^4y and (2e^t)²(3e^-t)

I then watched this video which I found to be good for understanding e. I followed along and used the X^y button on my calculator.

[Click here to continue]

[Back to Top]