please help with 1 - 3, solve all to be upvoted!!
1. For what values of a, if any, do the following series converge? a 1 a) Σ n=\n+2 n+4 2. Test for (a) absolute convergence, (b) conditional convergence. n! sin(nπ/4) b) n=0 (-2)" n² n=1 3. How many terms of the series do we need to add in order to find the sum to the indicated accuracy? a) (-1)" error <0.001 b) (-1)″n error <0.0002 n n=1 4" n=1 1 n=3n-1 b) Σ 2a n+1
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