Sunday, June 28, 2015

Use the derivative to determine whether the function y = 8e^x - 12 is strictly monotonic on its entire domain and therefore has an inverse function.

We are asked to determine if the function  y=8e^x-12 has an inverse function by finding if the function is strictly monotonic on its entire domain using the derivative. The domain is all real numbers.
y'=8e^x and y'>0 for all real x so the function is strictly monotonic (in this case strictly increasing) on its entire domain and thus has an inverse function.
The graph of the original function, which we can see is always increasing:

No comments:

Post a Comment

Why is the fact that the Americans are helping the Russians important?

In the late author Tom Clancy’s first novel, The Hunt for Red October, the assistance rendered to the Russians by the United States is impor...