Integral Test 13. (1 pt) Briefly why the Integral Test can't be used to determine if the series (21) (D (5.1) (81) (10.1) 18 COSTIn2) n=1 Vn is convergent. Hint: The graph at right shows the first 10 terms (3 -1) of the sequence an - cos(un). What's the pattern? What condition of the Integral Test is not satisfied by the infinite series? 13. (4 pts each) Use the Integral Test to determine whether the series are convergent or divergent. You do not need to show the series satisfies the conditions of the test. 18 n In(n) n-1