Mathematics
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choco_addicted

An undergraduate in South Korea. I major in Mathematics Education.

My picture is shared by Nick and in public domain(CC0).

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  • Member for 5 years, 1 month
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  • Last seen Jan 18 at 10:17

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107 $100$-th derivative of the function $f(x)=e^{x}\cos(x)$ Apr 21 '16
31 Prove the following trigonometric identity without a calculator involved Feb 17 '16
17 How to calculate $ \sum_{n=1}^{15}n(n!) = ? $ Feb 10 '16
14 How to prove that $k^3+3k^2+2k$ is always divisible by $3$? Feb 4 '16
13 How to express $f(n\alpha)$ in terms of $f(\alpha)$ Mar 25 '16
9 Exponential (to the power of a logarithm) Feb 4 '16
9 how to prove that $2^n = (n+1)(n+2)(n+3)$ has no solution when $n>0$? Apr 1 '18
8 Decide whether the series ${\sum_{n=1}^{\infty} \frac{1+5^n}{1+6^n}}$ converges or diverges May 21 '16
8 Solve $e^{4z} +e^{3z} + e^{2z} + e^z + 1 = 0$. Feb 5 '16
8 Minimal polynomial of $\sqrt{2+\sqrt[3]{3}}$ over $\mathbb{Q}$ Jul 7 '19
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