Below is an "oracle" function. An oracle function is a function presented interactively. When you type in an $x$ value, and press the --f--$>$ button and the value $f(x)$ appears in the right hand window. There are three lines, so you can easily calculate three different values of the function at one time.

Find the largest $\delta$ so that $\vert f(x)-f(4.148)\vert <0.0008$ when $\vert x-4.148\vert < \delta$.
$\delta =$

Note: Your answer must be within $0.000001$ of the correct answer.

Hint:

x		f(x)