11. Determine whether the series Σ» (1) n=1 converges or diverges. If it converges, find its sum.

at) Find all the values of x such that the given series would converge. (-1)(x^)(n+ 4) (9) " The series is convergent from x = to x = n=1 , left end included (enter Y or N): right end included (enter Y or N):

5. In this exercise we investigate the sequence {} for any constant b. a. Use the Ratio Test to determine if the series converges or diverges. fk b. Now apply the Ratio Test to determine if the series > converges for any constant b. c. Use your result from (b) to decide whether the sequence {} converges or diverges. If the sequence {} converges, to what does it converge? Explain your reasoning.