Cody

Problem 44478. Exponential decay

Created by Thomas Steffen in Community

Many dynamic processes can be approximated as an exponential decay. This applies to radioactive decay, some chemical reactions, ageing of LEDs etc. See https://en.wikipedia.org/wiki/Exponential_decay for more background.

Assume that the process starts with a normalised value of x(0) = 1, and it follows the following decay law:

x'(t) = - x(t) / tau

where x'(t) is the first derivative of x(t), and time constant tau is 2.

Write a function that returns the value x for a given input t. It should be able to deal with a vector input.

Solution Stats

80.0% Correct | 20.0% Incorrect
Last solution submitted on Aug 08, 2018

Problem Comments

Recent Solvers12

Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

MATLAB Academy

New to MATLAB?

Learn MATLAB today!