L28_A
Ch.12 Infinite series
12.2 Infinite series (無窮級數)
geometric series (等比級數)
harmonic series (調和級數)

L28_B
級數的四則運算
12.3 The integral test and comparison test (積分與比較審歛法)
p-series, p-test (p 級數, p 判別法)