How do i begin this problem for geometry?

Use the function nest to evaluate p(x) = 1 + x + · · · + x50 at x = 1.00001. (use the matlab ones command to save typing.) find the error of the computation by comparing with the equivalent expression q(x) = (x51 − 1)/(x − 1).

#12 find the value of x. #13 find the value of the variable.

Anyone know? is appreciated! will mark brainliest if correct!