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Bob Dobbs

Turkey

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Xday 🙏 (www.subgenius.com)

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15
How to calculate $\int_{0}^{\infty}\frac{x^{2}\ln x}{(1+x^{3})^4}dx$
math.stackexchange.com

13
How do we evaluate this REALLY tricky integral $\int{\frac{\cos 9x + \cos 6x}{2 \cos 5x-1} dx}$
math.stackexchange.com

11
What type of topological space is this?
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8
Easiest way to evaluate $\int_0^{\pi/6}\sec x\,dx$?
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8
$|\sin\phi_{n}(x)| = \sqrt{\frac{1}{2} - \dfrac{1}{2[1+ (\omega_{n}a(x))^{2}]^{1/2}}}$
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8
Evaluate $\sum_{n\geq 0} \mbox{arccot}(n^2 + n + 1)$
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8
Compute $ \lim_{ x \to a } \frac{x^x-x^a}{x-a} $ without L'Hopital's rule
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7
Why does my method for $\int\frac{dx}{\sqrt{4-5x^2}}$ not give an arcsin?
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7
Solve $\int_0^\infty\frac{\ln(2e^x-1)}{e^x-1}dx$
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6
Solve $\int_0^\infty\frac x{e^x-e^{\frac x2}}dx$
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6
Prove : $\int_0^{\infty} \frac{x^6+1}{x^{12}+1}\mathrm dx=\frac{\pi}{\sqrt{6}}$
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6
Can I avoid differentiation to find the remainder when $x^{73}-2x^{15}+3x-1$ is divided by $(x-1)^2$
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6
Find $\lim_{x\to \infty}\frac{\ln x}{x}=0$ without l'Hopital's rule
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6
Evaluating $\lim_{n \to \infty}\frac{3n-\sqrt{9n^2+3n+1}}{\sqrt{n^2+5n+4}-n}$
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6
Prove that $3^{271}<7^{153}$
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6
Show that $\frac 1 {10}< \sqrt{101} - \sqrt{99}$ without using a calculator
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5
Show that $\int_{0}^{2}\sqrt{x^2+1}\,dx$ is at least $2\sqrt{2}$ without evaluating the integral
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5
Evaluating limit without L'Hospital rule
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5
Minimum of the Gamma Function $\Gamma (x)$ for $x>0$. How to find $x_{\min}$?
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5
Evaluate $\lim\limits_{x\to 0} \frac{x(1-\cos x)}{x - \sin(x)}$ without Taylor series or L'Hôpital's rule?
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5
Power series solution of differential equation $x^2y'=y$
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5
Evaluating a value from symmetric polynomials
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5
How to evaluate: $\displaystyle\int_0^1\frac{xe^x-e^x}{x^2-2xe^x+e^{2x}}dx$
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5
Finding General Formulas for $\int_0^{2\pi} \frac{\mathrm dx}{a+b\cos(x)}$ and $\int_0^{2\pi} \frac{\mathrm dx}{a+b\sin(x)}$
math.stackexchange.com

5
How to say sum of complex number is non zero
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5
Other method Indefinite Integral :$\int \frac{1}{1+x^2} dx$
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5
Show by hand : $e^{e^2}>1000\phi$
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5
Calculate Riemann integral
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5
How to calculate $\int_{0}^{2\pi}\frac{\sin^{2}k}{(1+a\cos k)\sqrt{1+b\cos k}}dk$ (elliptic integral)?
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5
Taylor series for $\cot x$
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