10.5 Problems
Problem 1. Which sequences are convergent, ∞-divergent, or neither?
(a) an = 2−n2 (b) bn =
(c) cn =
(d) dn = sin(1∕n) (e) en = en(−1)n
Problem 2. Calculate the following limits.
(a) 
(b) 
(c) 
(d) 
(e) limn→∞(1 +
)n
Problem 3. Which series are absolute convergent, conditionally convergent, or divergent? (Use the direct comparison test, the root test, and the alternating series test.)
(a) 
(b) 
(c) 
(d) 
(e) ∑ n=0∞
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