Write a function named ser whose inputs are a function a number and a positive integer $.$ It will return the matrix $,$ where the first element is $,$ and then each successive number is the x raised to an additional power and divided by that power. Use a loop to create the matrix until the size of the matrix becomes $.$

The following is an example of how your function would be used in the command window:

$>>$ ser$(2\mathrm{.}8,1)$

ans $=$

$2\mathrm{.}8000$

$>>$ ser$(1,5)$

ans $=$

$1\mathrm{.}00000\mathrm{.}50000\mathrm{.}33330\mathrm{.}25000\mathrm{.}2000$

$>>$ ser$(-1,7)$

ans $=$

$-1\mathrm{.}00000\mathrm{.}5000-0\mathrm{.}33330\mathrm{.}2500-0\mathrm{.}20000\mathrm{.}1667-0\mathrm{.}1429$