Direction: Determine whether the series converges using any appropriate test. Identify the test for convergence used and show complete solution. (10 pts each) k! 1. ZK=0 104k 2. ER=O(-1) k k k+1 en 3. LK= 1 nn Il. Use sigma notation to write the Maclaurin's series for the function f(x) = x cosx. Show complete solution. (15 points)