9. Use the result in Problem $ to find the sum of the series (-1) + 2 10. A. Use the power series 1 1 + x (-1)*x" to determine a power series at c =0 for the function f(x) = = 1+x B. Use the result in A to evaluate the indefinite integral as a power series: 1+x 11. Using Maclaurin series of fix)= 83 = -=1+x+ 2! .+ .... A. Find Maclaurin series of e-x3 B. Using the first four terms of Maclaurin series of e- to evaluate Joe-*' dx (leave four decimal places) LatinHype