liyushu

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4

Triple integral in spherical coordinate, where am I wrong

Nov 13, 2022

2

$\int _{2}^{+\infty }\ \dfrac{\sin x}{x\ln x }dx$ is convergent but not absolutely convergent

Apr 4, 2022

2

$\iiint\limits_{D}\frac{dxdydz}{\sqrt{x^2+y^2+(z-\frac{1}{2})^2} }$ D is given by $x^2+y^2+z^2 \leq 1$

Nov 11, 2022

1

$\forall x > 0$, there exists a unique $\xi_x$ s.t.$ \int_{0}^{x}e^{t^2}dt=xe^{\xi_x^2}$; solve $\lim_{x \to \infty} \frac{\xi_x}{x} $

Mar 22, 2022

1

Find area of $x^2+axy+y^2=1$, $|a|\leq1$

Mar 30, 2022

Answers

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1

$\prod_{n=3 }^{+\infty} \cos\frac{\pi}{n}$is convergent or not?

Apr 27, 2022

1

Triple integral in spherical coordinate, where am I wrong

Nov 13, 2022

0

integral inequality in the question Sign of remainder in series for $\cos$ and $\sin$

Apr 15

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integration

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analysis

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convergence-divergence

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sequences-and-series

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complex-analysis

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