f(x) = e^x 

The only function in the world that satisfies ∫f(x)dx = f(x) and d/dx f(x) = f(x). Very dumb.

Question: ∫f(x) = f(x)
Because ∫f(x) = e^x
Therefore, the solution is e^x

f(x) = e^x by BladeX123uWu December 18, 2022