exp(x)

y = exp(x) = e^x 

Where e = $1+\dfrac{1}{1!}+\dfrac{2}{2!}+\dfrac{3}{3!}......$

Which is Euler's number

Example:

$\color{aqua}e^x\cdot e^{-x}= 1$

Uh sorry that holds for every values of x XDDDDD

$\color{blue}e^x=e^{-x}$

$\color{blue}\ln e^x = \ln e^{-x}$

$\color{blue}x=-x$ $\color{red}\leftarrow \color{}\boxed{\color{red}\ln x = \log_e x}\\\color{}\boxed{\color{red}\ln e^x=x}$

$\color{blue}2x=0$

$\color{blue}x=0$