L29_A
12.3 The integral test and comparison test (Conti.) (續.積分與比較審歛法)
12.4 The Ratio test and root test (比值與根值判別法)

L29_B
12.4 The Ratio test and root test (Conti.) (續.比值與根值判別法)
12.5 Absolute and conditional convergence;alternating series (絕對收斂和條件收斂;交替級數)
alternating series test (交錯級數判別法)