Arjang
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 Jul 22 comment On the surface of the moon @cschurman : Others have already given full answer, what more do you need? Jul 22 comment On the surface of the moon @I am trying to ask, please consider joining the rest of the word, use the MKS measurement units, didn't a mars lander crashed because some engineer calculated in feets instead of meters? Jul 22 comment On the surface of the moon Can they join rest of the word with MKS? feet? How do they measure Rum? Barrels? Jul 21 revised Evaluating $\int_0^a \frac{x^{b}+x^{c}}{(1+x)^{b+c+2}}$ deleted 2 characters in body; edited title Jul 20 revised Evaluating $\int_0^4 \int_{\sqrt {x}}^2 \frac{x^2 e^{y^2}}{y^5}\mathrm dy\,\mathrm dx$ edited title Jul 20 revised Evaluating $\int_{0}^1\int_{0}^1 xy\sqrt{x^2+y^2}\,dy\,dx$ edited title Jul 19 comment Does the infinite product $\prod_{n \mathop = 1}^\infty {\frac{2^n}{3^n}}$ diverge to zero or some other finite value. The correct terminology is : "it diverges to 0", consider taking the logarithm of this product and looking at the sum. Jul 17 comment Is mathematical history written by the victors? +1 for damn good question, All the math history I ever did might be just propaganda. Jul 17 comment What are some common pitfalls when squaring both sides of an equation? Please share what happens ! Jul 16 revised smallest $k$ s.t. $(x+y)^2\leq k(x^2-xy+y^2)$ edited title Jul 16 comment Fourier series is to Fourier transform what Laurent series is to …? +1 for the video links Jul 16 comment What's $P$ and what's $Q$ in this classic proof of the irrationality of $\sqrt 2$? @TheChaz2.0 : cool dude, not here to offend anyone, apologies and removed. Jul 15 comment What's $P$ and what's $Q$ in this classic proof of the irrationality of $\sqrt 2$? And you were correct, but during my time here I have noticed downvoting here is not about correct/incorrect answers. Sometimes changing something doesn't attract the downvoters. Jul 14 comment value of $\sum_{k=0}^{49}(k+1)(1.06)^{k+1}$ Where is this question from? Homework? Jul 14 revised What does $\mathrm d^2 x$ exactly mean? edited title Jul 14 comment Numbers that cannot be expressed as fractions $\sqrt 2 =\frac{2}{\sqrt 2}$ Jul 14 revised Numbers that cannot be expressed as fractions edited title Jul 14 revised Evaluation of $\int\frac{x}{\ln(x)} \mathrm dx$ edited title Jul 12 revised Sums $\sum_{k=1}^n \sin(2k-1)\theta$, $\sum_{k=1}^n \sin^2(2k-1)\theta$ edited title Jul 12 revised Evaluating $\int \frac{1}{2+3 \sin\left(x\right)}$ edited title