Expand the function in a power series E a,x" with center c = 0. Find a„x". 9+8x n=0 (Express numbers in exact form. Use symbolic notation and fractions where needed. For alternating series, include a factor of the form (-1)" in your answer.) anx" %3D Determine the interval of convergence. (Give your answers as intervals in the form (*, *). Use symbol o for infinity, U for combining intervals, and appropriate type of parenthesis " (", ") " , " [" or "] " depending on whether the interval is open or closed. Enter DNE if interval is empty. Express numbers in exact form. Use symbolic notation and fractions where needed.) x E

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