Question: Q 1 . [ 5 marks ] The series n = 1 ( - 1 ) n 4 n ( 2 n + 1 )

Q1.[5 marks] The series n=1(-1)n4n(2n+1)! converges. What does it converge to?
[Hint: Think of a trig function. ]
Q1.[5 marks] The series n=1(-1)n4n(2n+1)! converges. What does it converge to?

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