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Andrew.Wolphoe

I'm Andrew from Taiwan.

Please take a look at my blog (andrew.at.tw), and if you like it, please share it on social network!

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  • Taichung City, 台灣
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21 If a regular polygon has a fixed edge length, can I know how many edges it has by knowing the length from corner to its center? Jan 22 '19
3 Let $S_n$ to be the sum of the first n terms of a geometric series, then what does it mean if n isn't a whole number? Jul 17 '20
2 Given a function $f(x)$ that is define by $f(x-1)$, by knowing $f(0)$ is it possible to rewrite $f(x)$ without using $f(x-1)$ Aug 4 '20
0 Can I double integrate a function through r and theta instead of x and y? Oct 13 '20
0 Why $\int\sin\varphi\sqrt{r^2-2rz\cos\varphi+z^2}\,d\varphi$ results to having division by $rz$? Oct 17 '20
0 How to prove that $\frac{d}{dt}x(t)=-a x(t),\ x(0)=1,\ a>0$ will never go under 0? Nov 10 '20
0 Given a ring with circumference n, if a person walks s distance per step on it, could we prove that the person will eventually step on every point? Mar 1
0 Try to find the ratio of two arcs Feb 1 '19
0 What's the smoothness of the 4-D spacetime? Jul 4 '20

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