Answer:
which you can round or truncate as you need to.
Explanation:
Firstly, we need to understand what this question is asking us to do. The slope of the line tangent to the graph of
at x is simply
at x.
This means that all we are doing is finding when the derivative is equal to 2.
Here is our setup.

This is not a problem equation that you will be able to solve by hand as it utilizes a method that is not taught until later. This means that it is acceptable to use a calculator to find the solution.
In this case, we have two options. Graph both
and
and find their intersection, or graph
and find its zero.
Either way, you get
, which you can round or truncate as you need to.