7. [1 point] Use Series (tabulated in your Textbook) to evaluate the Limit: 1 - cos x lim x-0 1+x- ex 8. [1 point] Find the Sum of the Series (and explain your reasoning): 3n n! 5n n=0 9. [1 point] Use a Power Series (based on those tabulated in your Textbook) to approximate the Integral correct to 4 decimal places: 1/2 x2tan-1 (x2) dx