# macydanim

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 May11 awarded Caucus Apr29 comment How do I solve this second order differential equation using a power series?Hello Paul, it seems that you are new to this website. It would help if you explain what you have tried so far and it would also be appreciated if you invest more time into formulating your question. You can use $y''+x^2y'+xy=0$ to use Latex, the result would be $y''+x^2y'+xy=0$ which looks nicer than the formatting you used. Apr25 comment Finding $\lim_{x \to +\infty} \left(1+\frac{\cos x}{2\sqrt{x}}\right)$The first one is correct , for the second attempt you would need to show convergence for every sequence, not just for $x_n=n^2$. Edit: If you mention the sandwich you should also give a lower bound e.g. \begin{align} 1-\frac{1}{2\sqrt{x}} \leq 1 + \frac{\cos(x)}{2\sqrt{x}} \leq 1+\frac{1}{2\sqrt{x}} \end{align} Apr23 revised Definite integral including the ratio and power functions of a single variablechanged latex Apr23 comment Matrix Calculus in Least-Square methodIt really looks like the combination of our two answers cover both points ;) Apr22 revised Matrix Calculus in Least-Square methoddeleted 1 characters in body Apr22 answered Matrix Calculus in Least-Square method Apr22 answered Matlab plot3 see-through element Apr17 comment Matlab plot3 see-through elementThis might help. Apr17 answered Eigenvalues for Sturm Liouville problems and more general ODE/PDE Problems Apr17 comment How i could find this three-digitsDo you know how to mathematically formulate the first question? Apr17 answered Calculating $\lim\limits_{n\to\infty}\frac{(\ln n)^{2}}{n}$ Apr15 comment Complex mathematical question. Any help is much appreciated.Well, if you let $t \rightarrow \infty$ the term $(0.0000055..)^t$ reaches $0$, thus $D(t \rightarrow \infty) = 100$. Apr13 comment Complex mathematical question. Any help is much appreciated.The above answer includes the part for b). Or is there something you didn't understand? Apr11 comment Need little help in making matlab code related with iteration methods@srijan Comments added. I think that everybody else also could have helped, but the problem was that we first missinterpreted your question ;) Apr11 revised Need little help in making matlab code related with iteration methodsadded 589 characters in body Apr11 comment Need little help in making matlab code related with iteration methodsNo hurry. I will add some comments to the code soon. Apr11 revised Need little help in making matlab code related with iteration methodsadded 340 characters in body Apr11 answered Need little help in making matlab code related with iteration methods Apr11 comment Need little help in making matlab code related with iteration methodsSo lets say for a single matrix your method converges, you get $a=10^{-8}$ and for the next matrix your method converges with $a=10^{-9}$ you would want to get $mean(a) = 5 \cdot 10^{-8}$ ?