(2 points) T 6 35' Find the Maclaurin series for at) 2 3:: e 1* oo 13681: :2: n20 On what interval is the expansion valid? Give your answer using interval notation. If you need to use oo, type INF. If there is only one point in the interval of convergence, the interval notation is [a]. For example, if 0 is the only point in the interval of convergence, you would ansvver with [O]. The expansion is valid on