A PHASE relation familiar to students of applied mathematics exists between a simple harmonic oscillation and its derivative. Similar relations exist between exponential functions and their ...

PDF for mathematics from the official Punjab Board website. Access chapter-wise details for mathematics with the link to ...

So this is an exponential function. In fact, if you take the rate equation above and shrink the time interval to an infinitesimally small value (i.e., using differential calculus), you get a ...