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 Feb 3 answered Evaluate $(1-\frac1{2^2})(1-\frac1{3^2})\ldots(1-\frac1{2015^2})$ Feb 3 awarded Critic Feb 3 comment Integral proof $I_n=\int\frac{x^n}{\sqrt{x^2+5}} \, dx$ its a everywhere Feb 3 revised Integral proof $I_n=\int\frac{x^n}{\sqrt{x^2+5}} \, dx$ edited body Feb 3 asked Integral proof $I_n=\int\frac{x^n}{\sqrt{x^2+5}} \, dx$ Feb 3 accepted Evaluate $\int\sqrt[5]{\frac{x+5}{x-5}}\,\mathrm dx$ Feb 3 comment Taylor Series $(x+2)/(2-3x)$ at $x=2$ according to wolfram alpha it seems that $3^n$ should be $3^{n+1}$ Feb 3 comment Taylor Series $(x+2)/(2-3x)$ at $x=2$ to those who want to close this why?. Feb 3 asked Taylor Series $(x+2)/(2-3x)$ at $x=2$ Feb 3 asked Taylor series $\ln(x+3)$ at $x=1$ Feb 2 comment Find monotony of $f(x)=x^5 +x^4 -11x^3 + 9x^2$ @namsap because it isnt easy to find roots for derivative Feb 1 asked Find monotony of $f(x)=x^5 +x^4 -11x^3 + 9x^2$ Feb 1 comment How to find $\lim_{x\to\infty}{\frac{e^x}{x^a}}$? Why is it correct to take log ? Jan 27 comment Root with bolzano theorem cause theory has < . it makes sense but formally not Jan 27 asked Root with bolzano theorem Jan 27 accepted Limit find $f(x)$ $\lim_{x\to1}\frac{f(x)\cos{\frac{\pi x}{2}}}{\sqrt[3]x-1}=3$ Jan 27 comment Limit find $f(x)$ $\lim_{x\to1}\frac{f(x)\cos{\frac{\pi x}{2}}}{\sqrt[3]x-1}=3$ Just solving some before LHospital problems and want to learn without it too... Jan 27 comment Limit find $f(x)$ $\lim_{x\to1}\frac{f(x)\cos{\frac{\pi x}{2}}}{\sqrt[3]x-1}=3$ It seems the key was there to change cos to sin. I should have thought it... Jan 27 comment Limit find $f(x)$ $\lim_{x\to1}\frac{f(x)\cos{\frac{\pi x}{2}}}{\sqrt[3]x-1}=3$ hm yep, however I have added without l'Hospital tag. Any idea there ? Jan 27 asked Limit find $f(x)$ $\lim_{x\to1}\frac{f(x)\cos{\frac{\pi x}{2}}}{\sqrt[3]x-1}=3$