grandes-ecoles 2025 Q20

grandes-ecoles · France · mines-ponts-maths2__pc Sequences and Series Asymptotic Equivalents and Growth Estimates for Sequences/Series
By denoting $H _ { n } := \sum _ { k = 1 } ^ { n } \dfrac { 1 } { k }$ the harmonic series, show that $$H _ { n } \sim \ln n \quad ( n \rightarrow + \infty )$$
By denoting $H _ { n } := \sum _ { k = 1 } ^ { n } \dfrac { 1 } { k }$ the harmonic series, show that
$$H _ { n } \sim \ln n \quad ( n \rightarrow + \infty )$$