Hello im learning Racket adn i need help with this. I cannot get it to work:

Write a recursive function that calculates the power series to $20$ terms

$1\mathrm{.}3333333333330302($or something close to that$)$ is a correct answer.

If your function is called powerSeries, then $($exact$->$inexact $($powerSeries $20))$ will print out your result as a decimal number.

The file should contain the definition and tests the function.