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 Apr 1 revised Solve the exponential equations added 23 characters in body Apr 1 revised Solve the exponential equations added 4 characters in body Apr 1 revised Solve the exponential equations added 115 characters in body Apr 1 answered Solve the exponential equations Mar 11 revised Integrate $\int \frac{ e^{\tan^{-1}x}}{(1+x^2)^2} dx$ added 238 characters in body Mar 11 revised Integrate $\int \frac{ e^{\tan^{-1}x}}{(1+x^2)^2} dx$ added 238 characters in body Mar 11 revised Integrate $\int \frac{ e^{\tan^{-1}x}}{(1+x^2)^2} dx$ added 238 characters in body Mar 11 answered Integrate $\int \frac{ e^{\tan^{-1}x}}{(1+x^2)^2} dx$ Mar 9 answered How to integrate $\cos(x+a)\cos(x+a+b)$ where $a$ and $b$ are constants Mar 8 comment How to think about negative infinity in this limit $\lim_{x \to -\infty} \sqrt{x^2 + 3x} - \sqrt{x^2 + 1}$ Finally, if $x\to\infty$ the asnwers is $3/2,$ but as $x\to-\infty,$ i.e., for all number $x$ is negative, therefore $\frac{3x-1}{2x}\rightarrow-\frac{3}{2}$, for $x\to-\infty$ Mar 8 answered How to think about negative infinity in this limit $\lim_{x \to -\infty} \sqrt{x^2 + 3x} - \sqrt{x^2 + 1}$ Mar 5 awarded Popular Question Jan 19 answered To evaluate $\lim_{n \to \infty} \left(1+\frac{1}{2n}\right)^{n+5}$ Jan 6 revised Prove $\sqrt{n}+\sqrt{n+k}$ is irrational added 260 characters in body Jan 6 answered Prove $\sqrt{n}+\sqrt{n+k}$ is irrational Jan 6 revised Help me solve the limits added 641 characters in body Jan 6 revised Help me solve the limits added 510 characters in body Jan 6 revised Help me solve the limits added 510 characters in body Jan 6 revised Help me solve the limits added 510 characters in body Jan 6 answered Help me solve the limits