Joel Reyes Noche
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 Nov 27 reviewed Leave Closed Find all roots of a polynomial using secant method Nov 22 reviewed Approve What does the notation $C^{\infty}_{per}$ stand for? Nov 22 reviewed Leave Closed Is there something special about 2015? Nov 17 reviewed Approve Changing $\cos(x)$ to a form I have not seen before Nov 17 reviewed Close Two lemmas in graph theory Nov 16 reviewed Leave Closed Does the phrase “If you don't use it, you lose it” apply to mathematics? Nov 13 reviewed Close Prove that if $Re(z)>0$ then $|z+\sqrt{z^2-1}| \ge 1$ Nov 13 reviewed Approve Estimate function given PDF and covariance Nov 12 reviewed Approve We roll a six-sided die ten times. What is the probability that the total of all ten rolls is divisible by 6? Nov 12 reviewed Close Don't understand what the next step is in the trigonometry equation provided below to solve exactly. Nov 12 reviewed Close How to prove $n=4k+3$ cannot be the sum of two squares, x and y are integers Nov 11 reviewed Close Area of triangle given 3 equations of sides, without finding points of intersection Nov 11 reviewed Close Liapunov function (Energy function) for a nonlinear ODE system Nov 10 comment How many members are there in the swimming club given the following conditions? I don't understand. Wouldn't it have been much easier to type in the question? Why put it as an image? Are you trying to hide something or do you just want people to have more difficulty in answering your question? Nov 10 reviewed Close If $g(x)=\int_1 ^3f(x+t)dt$ what will be the value of $g'(0)$ Nov 10 comment Are there any situations in which L'Hopital's Rule WILL NOT work? $\lim_{x\to 0}\frac{\sin x}{x}$ can be shown to be equal to 1 without using L'Hôpital's rule. Nov 10 comment Are there any situations in which L'Hopital's Rule WILL NOT work? @Thomas, you are correct. Nov 10 comment Are there any situations in which L'Hopital's Rule WILL NOT work? Of course. Whenever the conditions for using it are not satisfied. Nov 7 comment Symmetric of equations (factorization) Why don't you just type in your question? Are you trying to hide something? Or do you just prefer to make it more difficult for us to answer your question? Nov 7 reviewed Close Give 5 proofs for $\int_0^{2 \pi} \ln(\frac{25}{16} - \sin(x)^2) dx = 0$.