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paulinho

I love doing research; don't know too much about anything; always eager to know more.

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  • Ngorongoro Crater, Ngorongoro, Arusha Region, Tanzania
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22 How can I prove that 3 planes are arranged in a triangle-like shape without calculating their intersection lines? Jul 14
8 Find $\lim\limits_{x\to 0} \frac{\sqrt{\ 1+x} - \sqrt{\ 1-x}}{\sqrt[3]{\ 1+x} - \sqrt[3]{\ 1-x}}$ Sep 20 '17
6 Why is this method incorrect? Jun 8 '19
6 Calculate the determinant of $n^\text{th}$ order Jul 13
5 Manipulate $f(a,b,c,d) = \frac{a}{b} - \frac{c}{d}$ so that the resulting expression can be seen as $g(a-c, b-d)$ Jul 17
5 Is there an optimal strategy for this game of card? Jun 28
5 Simplifying ${n\choose k} - {n-1 \choose k}$. Jun 29
5 Evaluate : $\lim \limits_{n\to\infty}n(1-\int_0^{n}(1-\frac{x}{n})^ndx)$ Jul 2 '19
4 Does a function $f$ with the following property exist? Aug 19
4 Reducing the Degrees of a Graph where All Degrees are Quite Concentrated Apr 15
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