Matlab question?

The function e x can be approximated by its McLaurin series expansion as follows (note the alternating + and -): e^-x 1 - x + x^2/2! - x^3/3! + ... plusminus x^n! Alternatively, note that e x = Thus, e^-x can also be approximated by 1 over the McLaurin series expansion of ex. That is, e^-x 1/1 + x + x^22! + x^33! + ... + x^n! Approximate e^-2 using both approaches above for n = 1, 2, ..., 6 and compare each approximation to the true value of e^-2 = 0.135335..., using the true relative error. What conclusions can you make about the two approaches