"e" (Edexcel A-Level Mathematics): Flashcards

$e$ is approximately equal to $2.718281828$.

The derivative of $e^x$ is $e^x$.

Use the natural logarithm: $x = \ln(a)$.

$\frac{dy}{dx} = ke^{kx}$.

$\ln(e^{x}) = x$.

No, $\ln(x)$ is undefined for $x < 0$.

$x = e^7 + 4$.

$m = 40e^{-0.132t}$.

$t \approx 10.5$ years.

$\ln(x)$ is the inverse of $e^x$.