Find the x values of all points where the function has any relative extrema Find the value s of any relative extrer f x x6 ex 8 Select the correct choice below and if necessary fill in any answer boxes within your choice OA There are no relative minima The function has a relative maximum of at x Use a comma to separate answers as needed Type exact answers in terms of e at x OB There are no relative maxima The function has a relative minimum of Use a comma to separate answers as needed Type exact answers in terms of e OC The function has a relative maximum of at x and a relative minimum of Use a comma to separate answers as needed Type exact answers in terms of e There are no relative extrema at x